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Finding the Fourth Proportional to 151,607.79, 209,060.46 and 105,720.78

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Solution

The fourth proportional to 151,607.79, 209,060.46 and 105,720.78 is: 145,784.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,607.79 : 209,060.46 = 105,720.78 : x
  2. Step 2: Convert to fraction form
    151,607.79/209,060.46 = 105,720.78/x
  3. Step 3: Cross multiply
    151,607.79x = 209,060.46 × 105,720.78
  4. Step 4: Simplify right side
    151,607.79x = 22,102,034,898.36
  5. Step 5: Solve for x
    x = 22,102,034,898.36/151,607.79
  6. Step 6: Final answer
    x = 145,784.30

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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.