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Finding the Fourth Proportional to 129,754.40, 179,061.12 and 70,138.40

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Solution

The fourth proportional to 129,754.40, 179,061.12 and 70,138.40 is: 96,791.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,754.40 : 179,061.12 = 70,138.40 : x
  2. Step 2: Convert to fraction form
    129,754.40/179,061.12 = 70,138.40/x
  3. Step 3: Cross multiply
    129,754.40x = 179,061.12 × 70,138.40
  4. Step 4: Simplify right side
    129,754.40x = 12,559,060,459.01
  5. Step 5: Solve for x
    x = 12,559,060,459.01/129,754.40
  6. Step 6: Final answer
    x = 96,791.02

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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.