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Finding the Fourth Proportional to 66,402.80, 99,604.20 and 57,762.80

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Solution

The fourth proportional to 66,402.80, 99,604.20 and 57,762.80 is: 86,644.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,402.80 : 99,604.20 = 57,762.80 : x
  2. Step 2: Convert to fraction form
    66,402.80/99,604.20 = 57,762.80/x
  3. Step 3: Cross multiply
    66,402.80x = 99,604.20 × 57,762.80
  4. Step 4: Simplify right side
    66,402.80x = 5,753,417,483.76
  5. Step 5: Solve for x
    x = 5,753,417,483.76/66,402.80
  6. Step 6: Final answer
    x = 86,644.20

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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.