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Finding the Fourth Proportional to 129,718, 179,011.08 and 70,102

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Solution

The fourth proportional to 129,718, 179,011.08 and 70,102 is: 96,740.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,718 : 179,011.08 = 70,102 : x
  2. Step 2: Convert to fraction form
    129,718/179,011.08 = 70,102/x
  3. Step 3: Cross multiply
    129,718x = 179,011.08 × 70,102
  4. Step 4: Simplify right side
    129,718x = 12,549,034,730.16
  5. Step 5: Solve for x
    x = 12,549,034,730.16/129,718
  6. Step 6: Final answer
    x = 96,740.89

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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.