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Finding the Fourth Proportional to 129,959, 179,343.96 and 70,343

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Solution

The fourth proportional to 129,959, 179,343.96 and 70,343 is: 97,073.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,959 : 179,343.96 = 70,343 : x
  2. Step 2: Convert to fraction form
    129,959/179,343.96 = 70,343/x
  3. Step 3: Cross multiply
    129,959x = 179,343.96 × 70,343
  4. Step 4: Simplify right side
    129,959x = 12,615,592,178.28
  5. Step 5: Solve for x
    x = 12,615,592,178.28/129,959
  6. Step 6: Final answer
    x = 97,073.63

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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.