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Finding the Fourth Proportional to 72,612.20, 100,193.06 and 45,385.06

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Solution

The fourth proportional to 72,612.20, 100,193.06 and 45,385.06 is: 62,624.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612.20 : 100,193.06 = 45,385.06 : x
  2. Step 2: Convert to fraction form
    72,612.20/100,193.06 = 45,385.06/x
  3. Step 3: Cross multiply
    72,612.20x = 100,193.06 × 45,385.06
  4. Step 4: Simplify right side
    72,612.20x = 4,547,268,039.68
  5. Step 5: Solve for x
    x = 4,547,268,039.68/72,612.20
  6. Step 6: Final answer
    x = 62,624.02

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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.