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Finding the Fourth Proportional to 61,782, 91,878.18 and 59,813.70

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Solution

The fourth proportional to 61,782, 91,878.18 and 59,813.70 is: 88,951.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,782 : 91,878.18 = 59,813.70 : x
  2. Step 2: Convert to fraction form
    61,782/91,878.18 = 59,813.70/x
  3. Step 3: Cross multiply
    61,782x = 91,878.18 × 59,813.70
  4. Step 4: Simplify right side
    61,782x = 5,495,573,895.07
  5. Step 5: Solve for x
    x = 5,495,573,895.07/61,782
  6. Step 6: Final answer
    x = 88,951.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.