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Finding the Fourth Proportional to 129,711, 179,001.18 and 70,095

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Solution

The fourth proportional to 129,711, 179,001.18 and 70,095 is: 96,731.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,711 : 179,001.18 = 70,095 : x
  2. Step 2: Convert to fraction form
    129,711/179,001.18 = 70,095/x
  3. Step 3: Cross multiply
    129,711x = 179,001.18 × 70,095
  4. Step 4: Simplify right side
    129,711x = 12,547,087,712.10
  5. Step 5: Solve for x
    x = 12,547,087,712.10/129,711
  6. Step 6: Final answer
    x = 96,731.10

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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.