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Finding the Fourth Proportional to 98,815.68, 136,578.96 and 87,404.40

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Solution

The fourth proportional to 98,815.68, 136,578.96 and 87,404.40 is: 120,806.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,815.68 : 136,578.96 = 87,404.40 : x
  2. Step 2: Convert to fraction form
    98,815.68/136,578.96 = 87,404.40/x
  3. Step 3: Cross multiply
    98,815.68x = 136,578.96 × 87,404.40
  4. Step 4: Simplify right side
    98,815.68x = 11,937,602,051.42
  5. Step 5: Solve for x
    x = 11,937,602,051.42/98,815.68
  6. Step 6: Final answer
    x = 120,806.76

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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.