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Finding the Fourth Proportional to 247,412.30, 371,069.85 and 81,200.30

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Solution

The fourth proportional to 247,412.30, 371,069.85 and 81,200.30 is: 121,784.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,412.30 : 371,069.85 = 81,200.30 : x
  2. Step 2: Convert to fraction form
    247,412.30/371,069.85 = 81,200.30/x
  3. Step 3: Cross multiply
    247,412.30x = 371,069.85 × 81,200.30
  4. Step 4: Simplify right side
    247,412.30x = 30,130,983,140.96
  5. Step 5: Solve for x
    x = 30,130,983,140.96/247,412.30
  6. Step 6: Final answer
    x = 121,784.50

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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.