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Finding the Fourth Proportional to 99,506.32, 137,311.14 and 56,480.76

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Solution

The fourth proportional to 99,506.32, 137,311.14 and 56,480.76 is: 77,939.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,506.32 : 137,311.14 = 56,480.76 : x
  2. Step 2: Convert to fraction form
    99,506.32/137,311.14 = 56,480.76/x
  3. Step 3: Cross multiply
    99,506.32x = 137,311.14 × 56,480.76
  4. Step 4: Simplify right side
    99,506.32x = 7,755,437,543.67
  5. Step 5: Solve for x
    x = 7,755,437,543.67/99,506.32
  6. Step 6: Final answer
    x = 77,939.15

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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.