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Finding the Fourth Proportional to 115,055.68, 172,551.84 and 72,872.48

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Solution

The fourth proportional to 115,055.68, 172,551.84 and 72,872.48 is: 109,288.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,055.68 : 172,551.84 = 72,872.48 : x
  2. Step 2: Convert to fraction form
    115,055.68/172,551.84 = 72,872.48/x
  3. Step 3: Cross multiply
    115,055.68x = 172,551.84 × 72,872.48
  4. Step 4: Simplify right side
    115,055.68x = 12,574,280,509.36
  5. Step 5: Solve for x
    x = 12,574,280,509.36/115,055.68
  6. Step 6: Final answer
    x = 109,288.65

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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.