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Finding the Fourth Proportional to 62,140.80, 93,211.20 and 20,587.80

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Solution

The fourth proportional to 62,140.80, 93,211.20 and 20,587.80 is: 30,881.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,140.80 : 93,211.20 = 20,587.80 : x
  2. Step 2: Convert to fraction form
    62,140.80/93,211.20 = 20,587.80/x
  3. Step 3: Cross multiply
    62,140.80x = 93,211.20 × 20,587.80
  4. Step 4: Simplify right side
    62,140.80x = 1,919,013,543.36
  5. Step 5: Solve for x
    x = 1,919,013,543.36/62,140.80
  6. Step 6: Final answer
    x = 30,881.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.