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Finding the Fourth Proportional to 98,987.80, 148,049.70 and 88,533.40

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Solution

The fourth proportional to 98,987.80, 148,049.70 and 88,533.40 is: 132,413.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,987.80 : 148,049.70 = 88,533.40 : x
  2. Step 2: Convert to fraction form
    98,987.80/148,049.70 = 88,533.40/x
  3. Step 3: Cross multiply
    98,987.80x = 148,049.70 × 88,533.40
  4. Step 4: Simplify right side
    98,987.80x = 13,107,343,309.98
  5. Step 5: Solve for x
    x = 13,107,343,309.98/98,987.80
  6. Step 6: Final answer
    x = 132,413.72

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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.