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Finding the Fourth Proportional to 57,068.80, 78,756.48 and 31,916.80

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Solution

The fourth proportional to 57,068.80, 78,756.48 and 31,916.80 is: 44,046.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,068.80 : 78,756.48 = 31,916.80 : x
  2. Step 2: Convert to fraction form
    57,068.80/78,756.48 = 31,916.80/x
  3. Step 3: Cross multiply
    57,068.80x = 78,756.48 × 31,916.80
  4. Step 4: Simplify right side
    57,068.80x = 2,513,654,820.86
  5. Step 5: Solve for x
    x = 2,513,654,820.86/57,068.80
  6. Step 6: Final answer
    x = 44,046.04

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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.