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Finding the Fourth Proportional to 124,423, 171,703.74 and 79,711

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Solution

The fourth proportional to 124,423, 171,703.74 and 79,711 is: 110,001.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,423 : 171,703.74 = 79,711 : x
  2. Step 2: Convert to fraction form
    124,423/171,703.74 = 79,711/x
  3. Step 3: Cross multiply
    124,423x = 171,703.74 × 79,711
  4. Step 4: Simplify right side
    124,423x = 13,686,676,819.14
  5. Step 5: Solve for x
    x = 13,686,676,819.14/124,423
  6. Step 6: Final answer
    x = 110,001.18

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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.