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Finding the Fourth Proportional to 65,407.76, 90,261.84 and 38,551.36

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Solution

The fourth proportional to 65,407.76, 90,261.84 and 38,551.36 is: 53,200.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,407.76 : 90,261.84 = 38,551.36 : x
  2. Step 2: Convert to fraction form
    65,407.76/90,261.84 = 38,551.36/x
  3. Step 3: Cross multiply
    65,407.76x = 90,261.84 × 38,551.36
  4. Step 4: Simplify right side
    65,407.76x = 3,479,716,688.10
  5. Step 5: Solve for x
    x = 3,479,716,688.10/65,407.76
  6. Step 6: Final answer
    x = 53,200.36

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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.