Home / 78,142.09-107,835.97-42,332.24

Finding the Fourth Proportional to 78,142.09, 107,835.97 and 42,332.24

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Solution

The fourth proportional to 78,142.09, 107,835.97 and 42,332.24 is: 58,418.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,142.09 : 107,835.97 = 42,332.24 : x
  2. Step 2: Convert to fraction form
    78,142.09/107,835.97 = 42,332.24/x
  3. Step 3: Cross multiply
    78,142.09x = 107,835.97 × 42,332.24
  4. Step 4: Simplify right side
    78,142.09x = 4,564,937,951.01
  5. Step 5: Solve for x
    x = 4,564,937,951.01/78,142.09
  6. Step 6: Final answer
    x = 58,418.43

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1.5x scale

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.