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Finding the Fourth Proportional to 129,920.28, 179,290.53 and 70,304.28

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Solution

The fourth proportional to 129,920.28, 179,290.53 and 70,304.28 is: 97,020.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,920.28 : 179,290.53 = 70,304.28 : x
  2. Step 2: Convert to fraction form
    129,920.28/179,290.53 = 70,304.28/x
  3. Step 3: Cross multiply
    129,920.28x = 179,290.53 × 70,304.28
  4. Step 4: Simplify right side
    129,920.28x = 12,604,891,622.47
  5. Step 5: Solve for x
    x = 12,604,891,622.47/129,920.28
  6. Step 6: Final answer
    x = 97,020.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.