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Finding the Fourth Proportional to 85,988.90, 118,661.28 and 47,750.42

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Solution

The fourth proportional to 85,988.90, 118,661.28 and 47,750.42 is: 65,893.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,988.90 : 118,661.28 = 47,750.42 : x
  2. Step 2: Convert to fraction form
    85,988.90/118,661.28 = 47,750.42/x
  3. Step 3: Cross multiply
    85,988.90x = 118,661.28 × 47,750.42
  4. Step 4: Simplify right side
    85,988.90x = 5,666,125,957.74
  5. Step 5: Solve for x
    x = 5,666,125,957.74/85,988.90
  6. Step 6: Final answer
    x = 65,893.69

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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.