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Finding the Fourth Proportional to 98,729.80, 147,662.70 and 88,275.40

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Solution

The fourth proportional to 98,729.80, 147,662.70 and 88,275.40 is: 132,026.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,729.80 : 147,662.70 = 88,275.40 : x
  2. Step 2: Convert to fraction form
    98,729.80/147,662.70 = 88,275.40/x
  3. Step 3: Cross multiply
    98,729.80x = 147,662.70 × 88,275.40
  4. Step 4: Simplify right side
    98,729.80x = 13,034,983,907.58
  5. Step 5: Solve for x
    x = 13,034,983,907.58/98,729.80
  6. Step 6: Final answer
    x = 132,026.84

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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.