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Finding the Fourth Proportional to 102.00, 152.16 and 99.21

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Solution

The fourth proportional to 102.00, 152.16 and 99.21 is: 148.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.00 : 152.16 = 99.21 : x
  2. Step 2: Convert to fraction form
    102.00/152.16 = 99.21/x
  3. Step 3: Cross multiply
    102.00x = 152.16 × 99.21
  4. Step 4: Simplify right side
    102.00x = 15,095.69
  5. Step 5: Solve for x
    x = 15,095.69/102.00
  6. Step 6: Final answer
    x = 148.00

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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.