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Finding the Fourth Proportional to 186,590.15, 279,719.47 and 72,711.60

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Solution

The fourth proportional to 186,590.15, 279,719.47 and 72,711.60 is: 109,002.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,590.15 : 279,719.47 = 72,711.60 : x
  2. Step 2: Convert to fraction form
    186,590.15/279,719.47 = 72,711.60/x
  3. Step 3: Cross multiply
    186,590.15x = 279,719.47 × 72,711.60
  4. Step 4: Simplify right side
    186,590.15x = 20,338,849,477.06
  5. Step 5: Solve for x
    x = 20,338,849,477.06/186,590.15
  6. Step 6: Final answer
    x = 109,002.80

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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.