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Finding the Fourth Proportional to 65,572,327.20, 98,358,490.80 and 20,128,216.80

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Solution

The fourth proportional to 65,572,327.20, 98,358,490.80 and 20,128,216.80 is: 30,192,325.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,572,327.20 : 98,358,490.80 = 20,128,216.80 : x
  2. Step 2: Convert to fraction form
    65,572,327.20/98,358,490.80 = 20,128,216.80/x
  3. Step 3: Cross multiply
    65,572,327.20x = 98,358,490.80 × 20,128,216.80
  4. Step 4: Simplify right side
    65,572,327.20x = 1,979,781,026,943,205.50
  5. Step 5: Solve for x
    x = 1,979,781,026,943,205.50/65,572,327.20
  6. Step 6: Final answer
    x = 30,192,325.20

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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.