Home / 85,729.20-128,612.18-43,615.16

Finding the Fourth Proportional to 85,729.20, 128,612.18 and 43,615.16

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Solution

The fourth proportional to 85,729.20, 128,612.18 and 43,615.16 is: 65,432.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,729.20 : 128,612.18 = 43,615.16 : x
  2. Step 2: Convert to fraction form
    85,729.20/128,612.18 = 43,615.16/x
  3. Step 3: Cross multiply
    85,729.20x = 128,612.18 × 43,615.16
  4. Step 4: Simplify right side
    85,729.20x = 5,609,440,808.65
  5. Step 5: Solve for x
    x = 5,609,440,808.65/85,729.20
  6. Step 6: Final answer
    x = 65,432.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.