Home / 129,035.25-178,068.65-72,446.63

Finding the Fourth Proportional to 129,035.25, 178,068.65 and 72,446.63

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Solution

The fourth proportional to 129,035.25, 178,068.65 and 72,446.63 is: 99,976.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,035.25 : 178,068.65 = 72,446.63 : x
  2. Step 2: Convert to fraction form
    129,035.25/178,068.65 = 72,446.63/x
  3. Step 3: Cross multiply
    129,035.25x = 178,068.65 × 72,446.63
  4. Step 4: Simplify right side
    129,035.25x = 12,900,472,348.57
  5. Step 5: Solve for x
    x = 12,900,472,348.57/129,035.25
  6. Step 6: Final answer
    x = 99,976.34

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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.