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Finding the Fourth Proportional to 65,317.76, 90,128.96 and 38,444.48

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Solution

The fourth proportional to 65,317.76, 90,128.96 and 38,444.48 is: 53,047.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,317.76 : 90,128.96 = 38,444.48 : x
  2. Step 2: Convert to fraction form
    65,317.76/90,128.96 = 38,444.48/x
  3. Step 3: Cross multiply
    65,317.76x = 90,128.96 × 38,444.48
  4. Step 4: Simplify right side
    65,317.76x = 3,464,961,000.14
  5. Step 5: Solve for x
    x = 3,464,961,000.14/65,317.76
  6. Step 6: Final answer
    x = 53,047.76

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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.