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Finding the Fourth Proportional to 99.10, 148.47 and 58.51

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Solution

The fourth proportional to 99.10, 148.47 and 58.51 is: 87.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.10 : 148.47 = 58.51 : x
  2. Step 2: Convert to fraction form
    99.10/148.47 = 58.51/x
  3. Step 3: Cross multiply
    99.10x = 148.47 × 58.51
  4. Step 4: Simplify right side
    99.10x = 8,686.98
  5. Step 5: Solve for x
    x = 8,686.98/99.10
  6. Step 6: Final answer
    x = 87.66

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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.