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Finding the Fourth Proportional to 111,502.63, 153,878.28 and 63,755.95

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Solution

The fourth proportional to 111,502.63, 153,878.28 and 63,755.95 is: 87,985.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,502.63 : 153,878.28 = 63,755.95 : x
  2. Step 2: Convert to fraction form
    111,502.63/153,878.28 = 63,755.95/x
  3. Step 3: Cross multiply
    111,502.63x = 153,878.28 × 63,755.95
  4. Step 4: Simplify right side
    111,502.63x = 9,810,655,925.77
  5. Step 5: Solve for x
    x = 9,810,655,925.77/111,502.63
  6. Step 6: Final answer
    x = 87,985.87

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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.