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Finding the Fourth Proportional to 65,305.68, 90,129.29 and 44,128.23

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Solution

The fourth proportional to 65,305.68, 90,129.29 and 44,128.23 is: 60,901.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,305.68 : 90,129.29 = 44,128.23 : x
  2. Step 2: Convert to fraction form
    65,305.68/90,129.29 = 44,128.23/x
  3. Step 3: Cross multiply
    65,305.68x = 90,129.29 × 44,128.23
  4. Step 4: Simplify right side
    65,305.68x = 3,977,245,818.22
  5. Step 5: Solve for x
    x = 3,977,245,818.22/65,305.68
  6. Step 6: Final answer
    x = 60,901.99

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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.