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Finding the Fourth Proportional to 129,940, 179,317.30 and 70,324

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Solution

The fourth proportional to 129,940, 179,317.30 and 70,324 is: 97,047.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,940 : 179,317.30 = 70,324 : x
  2. Step 2: Convert to fraction form
    129,940/179,317.30 = 70,324/x
  3. Step 3: Cross multiply
    129,940x = 179,317.30 × 70,324
  4. Step 4: Simplify right side
    129,940x = 12,610,309,805.20
  5. Step 5: Solve for x
    x = 12,610,309,805.20/129,940
  6. Step 6: Final answer
    x = 97,047.17

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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.