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Finding the Fourth Proportional to 100,934.40, 151,729.65 and 86,500.20

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Solution

The fourth proportional to 100,934.40, 151,729.65 and 86,500.20 is: 130,031.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,934.40 : 151,729.65 = 86,500.20 : x
  2. Step 2: Convert to fraction form
    100,934.40/151,729.65 = 86,500.20/x
  3. Step 3: Cross multiply
    100,934.40x = 151,729.65 × 86,500.20
  4. Step 4: Simplify right side
    100,934.40x = 13,124,645,070.93
  5. Step 5: Solve for x
    x = 13,124,645,070.93/100,934.40
  6. Step 6: Final answer
    x = 130,031.44

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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.