Home / 78,502.21-108,332.02-42,691.46

Finding the Fourth Proportional to 78,502.21, 108,332.02 and 42,691.46

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Solution

The fourth proportional to 78,502.21, 108,332.02 and 42,691.46 is: 58,913.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,502.21 : 108,332.02 = 42,691.46 : x
  2. Step 2: Convert to fraction form
    78,502.21/108,332.02 = 42,691.46/x
  3. Step 3: Cross multiply
    78,502.21x = 108,332.02 × 42,691.46
  4. Step 4: Simplify right side
    78,502.21x = 4,624,851,450.16
  5. Step 5: Solve for x
    x = 4,624,851,450.16/78,502.21
  6. Step 6: Final answer
    x = 58,913.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.