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Finding the Fourth Proportional to 145,871.95, 218,720.42 and 66,887.23

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Solution

The fourth proportional to 145,871.95, 218,720.42 and 66,887.23 is: 100,290.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,871.95 : 218,720.42 = 66,887.23 : x
  2. Step 2: Convert to fraction form
    145,871.95/218,720.42 = 66,887.23/x
  3. Step 3: Cross multiply
    145,871.95x = 218,720.42 × 66,887.23
  4. Step 4: Simplify right side
    145,871.95x = 14,629,602,703.80
  5. Step 5: Solve for x
    x = 14,629,602,703.80/145,871.95
  6. Step 6: Final answer
    x = 100,290.72

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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.