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Finding the Fourth Proportional to 191,956.80, 288,064.80 and 112,987.20

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Solution

The fourth proportional to 191,956.80, 288,064.80 and 112,987.20 is: 169,557.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,956.80 : 288,064.80 = 112,987.20 : x
  2. Step 2: Convert to fraction form
    191,956.80/288,064.80 = 112,987.20/x
  3. Step 3: Cross multiply
    191,956.80x = 288,064.80 × 112,987.20
  4. Step 4: Simplify right side
    191,956.80x = 32,547,635,170.56
  5. Step 5: Solve for x
    x = 32,547,635,170.56/191,956.80
  6. Step 6: Final answer
    x = 169,557.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.