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Finding the Fourth Proportional to 91,871.90, 137,754.20 and 35,646.34

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Solution

The fourth proportional to 91,871.90, 137,754.20 and 35,646.34 is: 53,448.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,871.90 : 137,754.20 = 35,646.34 : x
  2. Step 2: Convert to fraction form
    91,871.90/137,754.20 = 35,646.34/x
  3. Step 3: Cross multiply
    91,871.90x = 137,754.20 × 35,646.34
  4. Step 4: Simplify right side
    91,871.90x = 4,910,432,182.63
  5. Step 5: Solve for x
    x = 4,910,432,182.63/91,871.90
  6. Step 6: Final answer
    x = 53,448.69

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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.