Home / 65,587.28-90,510.60-35,781.20

Finding the Fourth Proportional to 65,587.28, 90,510.60 and 35,781.20

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Solution

The fourth proportional to 65,587.28, 90,510.60 and 35,781.20 is: 49,378.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,587.28 : 90,510.60 = 35,781.20 : x
  2. Step 2: Convert to fraction form
    65,587.28/90,510.60 = 35,781.20/x
  3. Step 3: Cross multiply
    65,587.28x = 90,510.60 × 35,781.20
  4. Step 4: Simplify right side
    65,587.28x = 3,238,577,880.72
  5. Step 5: Solve for x
    x = 3,238,577,880.72/65,587.28
  6. Step 6: Final answer
    x = 49,378.14

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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.