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Finding the Fourth Proportional to 156,678.72, 216,218.88 and 85,058.88

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Solution

The fourth proportional to 156,678.72, 216,218.88 and 85,058.88 is: 117,382.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,678.72 : 216,218.88 = 85,058.88 : x
  2. Step 2: Convert to fraction form
    156,678.72/216,218.88 = 85,058.88/x
  3. Step 3: Cross multiply
    156,678.72x = 216,218.88 × 85,058.88
  4. Step 4: Simplify right side
    156,678.72x = 18,391,335,767.65
  5. Step 5: Solve for x
    x = 18,391,335,767.65/156,678.72
  6. Step 6: Final answer
    x = 117,382.47

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1.5x scale

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.