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Finding the Fourth Proportional to 145,218.88, 217,853.70 and 66,341.08

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Solution

The fourth proportional to 145,218.88, 217,853.70 and 66,341.08 is: 99,523.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,218.88 : 217,853.70 = 66,341.08 : x
  2. Step 2: Convert to fraction form
    145,218.88/217,853.70 = 66,341.08/x
  3. Step 3: Cross multiply
    145,218.88x = 217,853.70 × 66,341.08
  4. Step 4: Simplify right side
    145,218.88x = 14,452,649,740.00
  5. Step 5: Solve for x
    x = 14,452,649,740.00/145,218.88
  6. Step 6: Final answer
    x = 99,523.21

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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.