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Finding the Fourth Proportional to 85,810.80, 128,543.40 and 59,545.20

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Solution

The fourth proportional to 85,810.80, 128,543.40 and 59,545.20 is: 89,197.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,810.80 : 128,543.40 = 59,545.20 : x
  2. Step 2: Convert to fraction form
    85,810.80/128,543.40 = 59,545.20/x
  3. Step 3: Cross multiply
    85,810.80x = 128,543.40 × 59,545.20
  4. Step 4: Simplify right side
    85,810.80x = 7,654,142,461.68
  5. Step 5: Solve for x
    x = 7,654,142,461.68/85,810.80
  6. Step 6: Final answer
    x = 89,197.89

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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.