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Finding the Fourth Proportional to 115,201.20, 172,510.20 and 91,873.20

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Solution

The fourth proportional to 115,201.20, 172,510.20 and 91,873.20 is: 137,577.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,201.20 : 172,510.20 = 91,873.20 : x
  2. Step 2: Convert to fraction form
    115,201.20/172,510.20 = 91,873.20/x
  3. Step 3: Cross multiply
    115,201.20x = 172,510.20 × 91,873.20
  4. Step 4: Simplify right side
    115,201.20x = 15,849,064,106.64
  5. Step 5: Solve for x
    x = 15,849,064,106.64/115,201.20
  6. Step 6: Final answer
    x = 137,577.25

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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.