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Finding the Fourth Proportional to 186,053.20, 279,079.80 and 172,931.20

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Solution

The fourth proportional to 186,053.20, 279,079.80 and 172,931.20 is: 259,396.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,053.20 : 279,079.80 = 172,931.20 : x
  2. Step 2: Convert to fraction form
    186,053.20/279,079.80 = 172,931.20/x
  3. Step 3: Cross multiply
    186,053.20x = 279,079.80 × 172,931.20
  4. Step 4: Simplify right side
    186,053.20x = 48,261,604,709.76
  5. Step 5: Solve for x
    x = 48,261,604,709.76/186,053.20
  6. Step 6: Final answer
    x = 259,396.80

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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.