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Finding the Fourth Proportional to 115,248.84, 172,872.84 and 45,078.72

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Solution

The fourth proportional to 115,248.84, 172,872.84 and 45,078.72 is: 67,617.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,248.84 : 172,872.84 = 45,078.72 : x
  2. Step 2: Convert to fraction form
    115,248.84/172,872.84 = 45,078.72/x
  3. Step 3: Cross multiply
    115,248.84x = 172,872.84 × 45,078.72
  4. Step 4: Simplify right side
    115,248.84x = 7,792,886,349.96
  5. Step 5: Solve for x
    x = 7,792,886,349.96/115,248.84
  6. Step 6: Final answer
    x = 67,617.92

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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.