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Finding the Fourth Proportional to 98,999.60, 148,499.40 and 63,978.80

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Solution

The fourth proportional to 98,999.60, 148,499.40 and 63,978.80 is: 95,968.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,999.60 : 148,499.40 = 63,978.80 : x
  2. Step 2: Convert to fraction form
    98,999.60/148,499.40 = 63,978.80/x
  3. Step 3: Cross multiply
    98,999.60x = 148,499.40 × 63,978.80
  4. Step 4: Simplify right side
    98,999.60x = 9,500,813,412.72
  5. Step 5: Solve for x
    x = 9,500,813,412.72/98,999.60
  6. Step 6: Final answer
    x = 95,968.20

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Similar ratio
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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.