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Finding the Fourth Proportional to 115,287.06, 172,931.40 and 36,407.64

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Solution

The fourth proportional to 115,287.06, 172,931.40 and 36,407.64 is: 54,611.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,287.06 : 172,931.40 = 36,407.64 : x
  2. Step 2: Convert to fraction form
    115,287.06/172,931.40 = 36,407.64/x
  3. Step 3: Cross multiply
    115,287.06x = 172,931.40 × 36,407.64
  4. Step 4: Simplify right side
    115,287.06x = 6,296,024,155.90
  5. Step 5: Solve for x
    x = 6,296,024,155.90/115,287.06
  6. Step 6: Final answer
    x = 54,611.72

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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.