Home / 78,318.18-108,079.17-42,508.23

Finding the Fourth Proportional to 78,318.18, 108,079.17 and 42,508.23

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Solution

The fourth proportional to 78,318.18, 108,079.17 and 42,508.23 is: 58,661.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,318.18 : 108,079.17 = 42,508.23 : x
  2. Step 2: Convert to fraction form
    78,318.18/108,079.17 = 42,508.23/x
  3. Step 3: Cross multiply
    78,318.18x = 108,079.17 × 42,508.23
  4. Step 4: Simplify right side
    78,318.18x = 4,594,254,216.57
  5. Step 5: Solve for x
    x = 4,594,254,216.57/78,318.18
  6. Step 6: Final answer
    x = 58,661.40

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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.