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Finding the Fourth Proportional to 115,281.40, 172,922.10 and 102,159.40

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Solution

The fourth proportional to 115,281.40, 172,922.10 and 102,159.40 is: 153,239.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,281.40 : 172,922.10 = 102,159.40 : x
  2. Step 2: Convert to fraction form
    115,281.40/172,922.10 = 102,159.40/x
  3. Step 3: Cross multiply
    115,281.40x = 172,922.10 × 102,159.40
  4. Step 4: Simplify right side
    115,281.40x = 17,665,617,982.74
  5. Step 5: Solve for x
    x = 17,665,617,982.74/115,281.40
  6. Step 6: Final answer
    x = 153,239.10

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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.