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Finding the Fourth Proportional to 142,877.80, 214,316.70 and 129,099.70

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Solution

The fourth proportional to 142,877.80, 214,316.70 and 129,099.70 is: 193,649.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,877.80 : 214,316.70 = 129,099.70 : x
  2. Step 2: Convert to fraction form
    142,877.80/214,316.70 = 129,099.70/x
  3. Step 3: Cross multiply
    142,877.80x = 214,316.70 × 129,099.70
  4. Step 4: Simplify right side
    142,877.80x = 27,668,221,674.99
  5. Step 5: Solve for x
    x = 27,668,221,674.99/142,877.80
  6. Step 6: Final answer
    x = 193,649.55

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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.