Home / 78,318.14-108,079.13-42,508.16

Finding the Fourth Proportional to 78,318.14, 108,079.13 and 42,508.16

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Solution

The fourth proportional to 78,318.14, 108,079.13 and 42,508.16 is: 58,661.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,318.14 : 108,079.13 = 42,508.16 : x
  2. Step 2: Convert to fraction form
    78,318.14/108,079.13 = 42,508.16/x
  3. Step 3: Cross multiply
    78,318.14x = 108,079.13 × 42,508.16
  4. Step 4: Simplify right side
    78,318.14x = 4,594,244,950.70
  5. Step 5: Solve for x
    x = 4,594,244,950.70/78,318.14
  6. Step 6: Final answer
    x = 58,661.31

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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.