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Finding the Fourth Proportional to 145,999.90, 218,999.85 and 98,998.30

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Solution

The fourth proportional to 145,999.90, 218,999.85 and 98,998.30 is: 148,497.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,999.90 : 218,999.85 = 98,998.30 : x
  2. Step 2: Convert to fraction form
    145,999.90/218,999.85 = 98,998.30/x
  3. Step 3: Cross multiply
    145,999.90x = 218,999.85 × 98,998.30
  4. Step 4: Simplify right side
    145,999.90x = 21,680,612,850.26
  5. Step 5: Solve for x
    x = 21,680,612,850.26/145,999.90
  6. Step 6: Final answer
    x = 148,497.45

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1.5x scale

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.