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Finding the Fourth Proportional to 99.04, 147.98 and 73.18

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Solution

The fourth proportional to 99.04, 147.98 and 73.18 is: 109.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.04 : 147.98 = 73.18 : x
  2. Step 2: Convert to fraction form
    99.04/147.98 = 73.18/x
  3. Step 3: Cross multiply
    99.04x = 147.98 × 73.18
  4. Step 4: Simplify right side
    99.04x = 10,829.18
  5. Step 5: Solve for x
    x = 10,829.18/99.04
  6. Step 6: Final answer
    x = 109.34

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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.