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Finding the Fourth Proportional to 186,328.47, 279,526.74 and 86,474.91

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Solution

The fourth proportional to 186,328.47, 279,526.74 and 86,474.91 is: 129,728.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,328.47 : 279,526.74 = 86,474.91 : x
  2. Step 2: Convert to fraction form
    186,328.47/279,526.74 = 86,474.91/x
  3. Step 3: Cross multiply
    186,328.47x = 279,526.74 × 86,474.91
  4. Step 4: Simplify right side
    186,328.47x = 24,172,049,684.09
  5. Step 5: Solve for x
    x = 24,172,049,684.09/186,328.47
  6. Step 6: Final answer
    x = 129,728.16

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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.