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Finding the Fourth Proportional to 82,770.60, 124,155.90 and 59,615.40

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Solution

The fourth proportional to 82,770.60, 124,155.90 and 59,615.40 is: 89,423.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,770.60 : 124,155.90 = 59,615.40 : x
  2. Step 2: Convert to fraction form
    82,770.60/124,155.90 = 59,615.40/x
  3. Step 3: Cross multiply
    82,770.60x = 124,155.90 × 59,615.40
  4. Step 4: Simplify right side
    82,770.60x = 7,401,603,640.86
  5. Step 5: Solve for x
    x = 7,401,603,640.86/82,770.60
  6. Step 6: Final answer
    x = 89,423.10

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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.