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Finding the Fourth Proportional to 105.47, 157.43 and 93.16

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Solution

The fourth proportional to 105.47, 157.43 and 93.16 is: 139.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.47 : 157.43 = 93.16 : x
  2. Step 2: Convert to fraction form
    105.47/157.43 = 93.16/x
  3. Step 3: Cross multiply
    105.47x = 157.43 × 93.16
  4. Step 4: Simplify right side
    105.47x = 14,666.18
  5. Step 5: Solve for x
    x = 14,666.18/105.47
  6. Step 6: Final answer
    x = 139.06

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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.