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Finding the Fourth Proportional to 99.08, 147.65 and 93.31

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Solution

The fourth proportional to 99.08, 147.65 and 93.31 is: 139.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.08 : 147.65 = 93.31 : x
  2. Step 2: Convert to fraction form
    99.08/147.65 = 93.31/x
  3. Step 3: Cross multiply
    99.08x = 147.65 × 93.31
  4. Step 4: Simplify right side
    99.08x = 13,777.22
  5. Step 5: Solve for x
    x = 13,777.22/99.08
  6. Step 6: Final answer
    x = 139.05

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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.