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Finding the Fourth Proportional to 98,541.20, 147,811.80 and 42,408.20

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Solution

The fourth proportional to 98,541.20, 147,811.80 and 42,408.20 is: 63,612.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,541.20 : 147,811.80 = 42,408.20 : x
  2. Step 2: Convert to fraction form
    98,541.20/147,811.80 = 42,408.20/x
  3. Step 3: Cross multiply
    98,541.20x = 147,811.80 × 42,408.20
  4. Step 4: Simplify right side
    98,541.20x = 6,268,432,376.76
  5. Step 5: Solve for x
    x = 6,268,432,376.76/98,541.20
  6. Step 6: Final answer
    x = 63,612.30

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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.