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Finding the Fourth Proportional to 98,357.79, 147,287.55 and 60,990.86

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Solution

The fourth proportional to 98,357.79, 147,287.55 and 60,990.86 is: 91,331.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,357.79 : 147,287.55 = 60,990.86 : x
  2. Step 2: Convert to fraction form
    98,357.79/147,287.55 = 60,990.86/x
  3. Step 3: Cross multiply
    98,357.79x = 147,287.55 × 60,990.86
  4. Step 4: Simplify right side
    98,357.79x = 8,983,193,605.36
  5. Step 5: Solve for x
    x = 8,983,193,605.36/98,357.79
  6. Step 6: Final answer
    x = 91,331.80

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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.