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Finding the Fourth Proportional to 78,590.65, 108,248.50 and 60,406.60

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Solution

The fourth proportional to 78,590.65, 108,248.50 and 60,406.60 is: 83,202.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,590.65 : 108,248.50 = 60,406.60 : x
  2. Step 2: Convert to fraction form
    78,590.65/108,248.50 = 60,406.60/x
  3. Step 3: Cross multiply
    78,590.65x = 108,248.50 × 60,406.60
  4. Step 4: Simplify right side
    78,590.65x = 6,538,923,538.07
  5. Step 5: Solve for x
    x = 6,538,923,538.07/78,590.65
  6. Step 6: Final answer
    x = 83,202.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.