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Finding the Fourth Proportional to 67,130.77, 100,710.87 and 20,387.29

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Solution

The fourth proportional to 67,130.77, 100,710.87 and 20,387.29 is: 30,585.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,130.77 : 100,710.87 = 20,387.29 : x
  2. Step 2: Convert to fraction form
    67,130.77/100,710.87 = 20,387.29/x
  3. Step 3: Cross multiply
    67,130.77x = 100,710.87 × 20,387.29
  4. Step 4: Simplify right side
    67,130.77x = 2,053,221,712.84
  5. Step 5: Solve for x
    x = 2,053,221,712.84/67,130.77
  6. Step 6: Final answer
    x = 30,585.40

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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.