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Finding the Fourth Proportional to 124.64, 187.28 and 70.58

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Solution

The fourth proportional to 124.64, 187.28 and 70.58 is: 106.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.64 : 187.28 = 70.58 : x
  2. Step 2: Convert to fraction form
    124.64/187.28 = 70.58/x
  3. Step 3: Cross multiply
    124.64x = 187.28 × 70.58
  4. Step 4: Simplify right side
    124.64x = 13,218.22
  5. Step 5: Solve for x
    x = 13,218.22/124.64
  6. Step 6: Final answer
    x = 106.05

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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.