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Finding the Fourth Proportional to 129,979, 179,371.50 and 70,363

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Solution

The fourth proportional to 129,979, 179,371.50 and 70,363 is: 97,101.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,979 : 179,371.50 = 70,363 : x
  2. Step 2: Convert to fraction form
    129,979/179,371.50 = 70,363/x
  3. Step 3: Cross multiply
    129,979x = 179,371.50 × 70,363
  4. Step 4: Simplify right side
    129,979x = 12,621,116,854.50
  5. Step 5: Solve for x
    x = 12,621,116,854.50/129,979
  6. Step 6: Final answer
    x = 97,101.20

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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.