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Finding the Fourth Proportional to 124,476.48, 171,728.64 and 76,646.88

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Solution

The fourth proportional to 124,476.48, 171,728.64 and 76,646.88 is: 105,742.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,476.48 : 171,728.64 = 76,646.88 : x
  2. Step 2: Convert to fraction form
    124,476.48/171,728.64 = 76,646.88/x
  3. Step 3: Cross multiply
    124,476.48x = 171,728.64 × 76,646.88
  4. Step 4: Simplify right side
    124,476.48x = 13,162,464,462.64
  5. Step 5: Solve for x
    x = 13,162,464,462.64/124,476.48
  6. Step 6: Final answer
    x = 105,742.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.