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Finding the Fourth Proportional to 129,981, 179,374.02 and 70,365

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Solution

The fourth proportional to 129,981, 179,374.02 and 70,365 is: 97,103.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,981 : 179,374.02 = 70,365 : x
  2. Step 2: Convert to fraction form
    129,981/179,374.02 = 70,365/x
  3. Step 3: Cross multiply
    129,981x = 179,374.02 × 70,365
  4. Step 4: Simplify right side
    129,981x = 12,621,652,917.30
  5. Step 5: Solve for x
    x = 12,621,652,917.30/129,981
  6. Step 6: Final answer
    x = 97,103.83

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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.