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Finding the Fourth Proportional to 98,569.70, 147,854.55 and 78,886.70

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Solution

The fourth proportional to 98,569.70, 147,854.55 and 78,886.70 is: 118,330.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,569.70 : 147,854.55 = 78,886.70 : x
  2. Step 2: Convert to fraction form
    98,569.70/147,854.55 = 78,886.70/x
  3. Step 3: Cross multiply
    98,569.70x = 147,854.55 × 78,886.70
  4. Step 4: Simplify right side
    98,569.70x = 11,663,757,529.49
  5. Step 5: Solve for x
    x = 11,663,757,529.49/98,569.70
  6. Step 6: Final answer
    x = 118,330.05

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1.5x scale

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.