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Finding the Fourth Proportional to 109,181.84, 150,679.80 and 61,432.40

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Solution

The fourth proportional to 109,181.84, 150,679.80 and 61,432.40 is: 84,781.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,181.84 : 150,679.80 = 61,432.40 : x
  2. Step 2: Convert to fraction form
    109,181.84/150,679.80 = 61,432.40/x
  3. Step 3: Cross multiply
    109,181.84x = 150,679.80 × 61,432.40
  4. Step 4: Simplify right side
    109,181.84x = 9,256,621,745.52
  5. Step 5: Solve for x
    x = 9,256,621,745.52/109,181.84
  6. Step 6: Final answer
    x = 84,781.70

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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.