Home / 420,713,005.76-631,137,315.36-129,580,032.32

Finding the Fourth Proportional to 420,713,005.76, 631,137,315.36 and 129,580,032.32

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Solution

The fourth proportional to 420,713,005.76, 631,137,315.36 and 129,580,032.32 is: 194,390,933.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,713,005.76 : 631,137,315.36 = 129,580,032.32 : x
  2. Step 2: Convert to fraction form
    420,713,005.76/631,137,315.36 = 129,580,032.32/x
  3. Step 3: Cross multiply
    420,713,005.76x = 631,137,315.36 × 129,580,032.32
  4. Step 4: Simplify right side
    420,713,005.76x = 81,782,793,722,706,832
  5. Step 5: Solve for x
    x = 81,782,793,722,706,832/420,713,005.76
  6. Step 6: Final answer
    x = 194,390,933.02

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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.