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Finding the Fourth Proportional to 86,005.53, 118,430.51 and 79,732.89

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Solution

The fourth proportional to 86,005.53, 118,430.51 and 79,732.89 is: 109,793.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,005.53 : 118,430.51 = 79,732.89 : x
  2. Step 2: Convert to fraction form
    86,005.53/118,430.51 = 79,732.89/x
  3. Step 3: Cross multiply
    86,005.53x = 118,430.51 × 79,732.89
  4. Step 4: Simplify right side
    86,005.53x = 9,442,806,427.81
  5. Step 5: Solve for x
    x = 9,442,806,427.81/86,005.53
  6. Step 6: Final answer
    x = 109,793.01

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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.