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Finding the Fourth Proportional to 70,805.91, 106,209.14 and 28,686.78

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Solution

The fourth proportional to 70,805.91, 106,209.14 and 28,686.78 is: 43,030.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,805.91 : 106,209.14 = 28,686.78 : x
  2. Step 2: Convert to fraction form
    70,805.91/106,209.14 = 28,686.78/x
  3. Step 3: Cross multiply
    70,805.91x = 106,209.14 × 28,686.78
  4. Step 4: Simplify right side
    70,805.91x = 3,046,798,233.17
  5. Step 5: Solve for x
    x = 3,046,798,233.17/70,805.91
  6. Step 6: Final answer
    x = 43,030.28

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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.