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Finding the Fourth Proportional to 186,391.80, 279,587.70 and 53,276.40

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Solution

The fourth proportional to 186,391.80, 279,587.70 and 53,276.40 is: 79,914.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,391.80 : 279,587.70 = 53,276.40 : x
  2. Step 2: Convert to fraction form
    186,391.80/279,587.70 = 53,276.40/x
  3. Step 3: Cross multiply
    186,391.80x = 279,587.70 × 53,276.40
  4. Step 4: Simplify right side
    186,391.80x = 14,895,426,140.28
  5. Step 5: Solve for x
    x = 14,895,426,140.28/186,391.80
  6. Step 6: Final answer
    x = 79,914.60

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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.