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Finding the Fourth Proportional to 91,893.40, 137,840.10 and 39,308.20

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Solution

The fourth proportional to 91,893.40, 137,840.10 and 39,308.20 is: 58,962.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,893.40 : 137,840.10 = 39,308.20 : x
  2. Step 2: Convert to fraction form
    91,893.40/137,840.10 = 39,308.20/x
  3. Step 3: Cross multiply
    91,893.40x = 137,840.10 × 39,308.20
  4. Step 4: Simplify right side
    91,893.40x = 5,418,246,218.82
  5. Step 5: Solve for x
    x = 5,418,246,218.82/91,893.40
  6. Step 6: Final answer
    x = 58,962.30

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1.5x scale

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.