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Finding the Fourth Proportional to 115,281.20, 172,921.80 and 91,953.20

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Solution

The fourth proportional to 115,281.20, 172,921.80 and 91,953.20 is: 137,929.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,281.20 : 172,921.80 = 91,953.20 : x
  2. Step 2: Convert to fraction form
    115,281.20/172,921.80 = 91,953.20/x
  3. Step 3: Cross multiply
    115,281.20x = 172,921.80 × 91,953.20
  4. Step 4: Simplify right side
    115,281.20x = 15,900,712,859.76
  5. Step 5: Solve for x
    x = 15,900,712,859.76/115,281.20
  6. Step 6: Final answer
    x = 137,929.80

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1.5x scale

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.