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Finding the Fourth Proportional to 230,990.60, 318,746.27 and 129,001.88

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Solution

The fourth proportional to 230,990.60, 318,746.27 and 129,001.88 is: 178,011.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,990.60 : 318,746.27 = 129,001.88 : x
  2. Step 2: Convert to fraction form
    230,990.60/318,746.27 = 129,001.88/x
  3. Step 3: Cross multiply
    230,990.60x = 318,746.27 × 129,001.88
  4. Step 4: Simplify right side
    230,990.60x = 41,118,869,192.36
  5. Step 5: Solve for x
    x = 41,118,869,192.36/230,990.60
  6. Step 6: Final answer
    x = 178,011.00

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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.