Home / 78,142.23-107,836.26-42,332.23

Finding the Fourth Proportional to 78,142.23, 107,836.26 and 42,332.23

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Solution

The fourth proportional to 78,142.23, 107,836.26 and 42,332.23 is: 58,418.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,142.23 : 107,836.26 = 42,332.23 : x
  2. Step 2: Convert to fraction form
    78,142.23/107,836.26 = 42,332.23/x
  3. Step 3: Cross multiply
    78,142.23x = 107,836.26 × 42,332.23
  4. Step 4: Simplify right side
    78,142.23x = 4,564,949,759.06
  5. Step 5: Solve for x
    x = 4,564,949,759.06/78,142.23
  6. Step 6: Final answer
    x = 58,418.47

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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.