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Finding the Fourth Proportional to 91,877.88, 137,822.28 and 28,707.12

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Solution

The fourth proportional to 91,877.88, 137,822.28 and 28,707.12 is: 43,062.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,877.88 : 137,822.28 = 28,707.12 : x
  2. Step 2: Convert to fraction form
    91,877.88/137,822.28 = 28,707.12/x
  3. Step 3: Cross multiply
    91,877.88x = 137,822.28 × 28,707.12
  4. Step 4: Simplify right side
    91,877.88x = 3,956,480,730.63
  5. Step 5: Solve for x
    x = 3,956,480,730.63/91,877.88
  6. Step 6: Final answer
    x = 43,062.39

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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.