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Finding the Fourth Proportional to 72,648.90, 100,258.02 and 40,817.16

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Solution

The fourth proportional to 72,648.90, 100,258.02 and 40,817.16 is: 56,329.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,648.90 : 100,258.02 = 40,817.16 : x
  2. Step 2: Convert to fraction form
    72,648.90/100,258.02 = 40,817.16/x
  3. Step 3: Cross multiply
    72,648.90x = 100,258.02 × 40,817.16
  4. Step 4: Simplify right side
    72,648.90x = 4,092,247,643.62
  5. Step 5: Solve for x
    x = 4,092,247,643.62/72,648.90
  6. Step 6: Final answer
    x = 56,329.11

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1.5x scale

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.