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Finding the Fourth Proportional to 72,404.64, 100,010.16 and 65,328.48

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Solution

The fourth proportional to 72,404.64, 100,010.16 and 65,328.48 is: 90,236.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,404.64 : 100,010.16 = 65,328.48 : x
  2. Step 2: Convert to fraction form
    72,404.64/100,010.16 = 65,328.48/x
  3. Step 3: Cross multiply
    72,404.64x = 100,010.16 × 65,328.48
  4. Step 4: Simplify right side
    72,404.64x = 6,533,511,737.36
  5. Step 5: Solve for x
    x = 6,533,511,737.36/72,404.64
  6. Step 6: Final answer
    x = 90,236.09

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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.