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Finding the Fourth Proportional to 141,800.76, 212,500.62 and 78,648.71

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Solution

The fourth proportional to 141,800.76, 212,500.62 and 78,648.71 is: 117,861.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,800.76 : 212,500.62 = 78,648.71 : x
  2. Step 2: Convert to fraction form
    141,800.76/212,500.62 = 78,648.71/x
  3. Step 3: Cross multiply
    141,800.76x = 212,500.62 × 78,648.71
  4. Step 4: Simplify right side
    141,800.76x = 16,712,898,574.70
  5. Step 5: Solve for x
    x = 16,712,898,574.70/141,800.76
  6. Step 6: Final answer
    x = 117,861.84

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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.