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Finding the Fourth Proportional to 129,932, 179,306.40 and 70,316

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Solution

The fourth proportional to 129,932, 179,306.40 and 70,316 is: 97,036.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,932 : 179,306.40 = 70,316 : x
  2. Step 2: Convert to fraction form
    129,932/179,306.40 = 70,316/x
  3. Step 3: Cross multiply
    129,932x = 179,306.40 × 70,316
  4. Step 4: Simplify right side
    129,932x = 12,608,108,822.40
  5. Step 5: Solve for x
    x = 12,608,108,822.40/129,932
  6. Step 6: Final answer
    x = 97,036.21

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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.