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Finding the Fourth Proportional to 98,617.80, 147,926.70 and 82,871.40

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Solution

The fourth proportional to 98,617.80, 147,926.70 and 82,871.40 is: 124,307.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,617.80 : 147,926.70 = 82,871.40 : x
  2. Step 2: Convert to fraction form
    98,617.80/147,926.70 = 82,871.40/x
  3. Step 3: Cross multiply
    98,617.80x = 147,926.70 × 82,871.40
  4. Step 4: Simplify right side
    98,617.80x = 12,258,892,726.38
  5. Step 5: Solve for x
    x = 12,258,892,726.38/98,617.80
  6. Step 6: Final answer
    x = 124,307.10

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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.