Home / 77,340.12-115,780.54-42,173.16

Finding the Fourth Proportional to 77,340.12, 115,780.54 and 42,173.16

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Solution

The fourth proportional to 77,340.12, 115,780.54 and 42,173.16 is: 63,134.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,340.12 : 115,780.54 = 42,173.16 : x
  2. Step 2: Convert to fraction form
    77,340.12/115,780.54 = 42,173.16/x
  3. Step 3: Cross multiply
    77,340.12x = 115,780.54 × 42,173.16
  4. Step 4: Simplify right side
    77,340.12x = 4,882,830,777.77
  5. Step 5: Solve for x
    x = 4,882,830,777.77/77,340.12
  6. Step 6: Final answer
    x = 63,134.52

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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.