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Finding the Fourth Proportional to 98,679.90, 147,081.78 and 93,075.11

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Solution

The fourth proportional to 98,679.90, 147,081.78 and 93,075.11 is: 138,727.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,679.90 : 147,081.78 = 93,075.11 : x
  2. Step 2: Convert to fraction form
    98,679.90/147,081.78 = 93,075.11/x
  3. Step 3: Cross multiply
    98,679.90x = 147,081.78 × 93,075.11
  4. Step 4: Simplify right side
    98,679.90x = 13,689,652,117.09
  5. Step 5: Solve for x
    x = 13,689,652,117.09/98,679.90
  6. Step 6: Final answer
    x = 138,727.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.