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Finding the Fourth Proportional to 91,995.63, 138,046.98 and 38,683.74

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Solution

The fourth proportional to 91,995.63, 138,046.98 and 38,683.74 is: 58,048.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,995.63 : 138,046.98 = 38,683.74 : x
  2. Step 2: Convert to fraction form
    91,995.63/138,046.98 = 38,683.74/x
  3. Step 3: Cross multiply
    91,995.63x = 138,046.98 × 38,683.74
  4. Step 4: Simplify right side
    91,995.63x = 5,340,173,482.11
  5. Step 5: Solve for x
    x = 5,340,173,482.11/91,995.63
  6. Step 6: Final answer
    x = 58,048.12

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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.