Home / 420,713,009.76-631,137,321.36-129,580,036.32

Finding the Fourth Proportional to 420,713,009.76, 631,137,321.36 and 129,580,036.32

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Solution

The fourth proportional to 420,713,009.76, 631,137,321.36 and 129,580,036.32 is: 194,390,939.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,713,009.76 : 631,137,321.36 = 129,580,036.32 : x
  2. Step 2: Convert to fraction form
    420,713,009.76/631,137,321.36 = 129,580,036.32/x
  3. Step 3: Cross multiply
    420,713,009.76x = 631,137,321.36 × 129,580,036.32
  4. Step 4: Simplify right side
    420,713,009.76x = 81,782,797,024,736,304
  5. Step 5: Solve for x
    x = 81,782,797,024,736,304/420,713,009.76
  6. Step 6: Final answer
    x = 194,390,939.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.