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Finding the Fourth Proportional to 73,915.40, 102,005.62 and 40,381.40

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Solution

The fourth proportional to 73,915.40, 102,005.62 and 40,381.40 is: 55,727.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,915.40 : 102,005.62 = 40,381.40 : x
  2. Step 2: Convert to fraction form
    73,915.40/102,005.62 = 40,381.40/x
  3. Step 3: Cross multiply
    73,915.40x = 102,005.62 × 40,381.40
  4. Step 4: Simplify right side
    73,915.40x = 4,119,129,743.47
  5. Step 5: Solve for x
    x = 4,119,129,743.47/73,915.40
  6. Step 6: Final answer
    x = 55,727.63

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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.