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Finding the Fourth Proportional to 57,841.40, 86,762.10 and 47,999.90

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Solution

The fourth proportional to 57,841.40, 86,762.10 and 47,999.90 is: 71,999.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,841.40 : 86,762.10 = 47,999.90 : x
  2. Step 2: Convert to fraction form
    57,841.40/86,762.10 = 47,999.90/x
  3. Step 3: Cross multiply
    57,841.40x = 86,762.10 × 47,999.90
  4. Step 4: Simplify right side
    57,841.40x = 4,164,572,123.79
  5. Step 5: Solve for x
    x = 4,164,572,123.79/57,841.40
  6. Step 6: Final answer
    x = 71,999.85

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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.