Home / 78,142.12-107,836.40-42,332.04

Finding the Fourth Proportional to 78,142.12, 107,836.40 and 42,332.04

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Solution

The fourth proportional to 78,142.12, 107,836.40 and 42,332.04 is: 58,418.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,142.12 : 107,836.40 = 42,332.04 : x
  2. Step 2: Convert to fraction form
    78,142.12/107,836.40 = 42,332.04/x
  3. Step 3: Cross multiply
    78,142.12x = 107,836.40 × 42,332.04
  4. Step 4: Simplify right side
    78,142.12x = 4,564,934,904.09
  5. Step 5: Solve for x
    x = 4,564,934,904.09/78,142.12
  6. Step 6: Final answer
    x = 58,418.37

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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.