Home / 85,149.12-127,725-28,223.16

Finding the Fourth Proportional to 85,149.12, 127,725 and 28,223.16

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Solution

The fourth proportional to 85,149.12, 127,725 and 28,223.16 is: 42,335.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,149.12 : 127,725 = 28,223.16 : x
  2. Step 2: Convert to fraction form
    85,149.12/127,725 = 28,223.16/x
  3. Step 3: Cross multiply
    85,149.12x = 127,725 × 28,223.16
  4. Step 4: Simplify right side
    85,149.12x = 3,604,803,111
  5. Step 5: Solve for x
    x = 3,604,803,111/85,149.12
  6. Step 6: Final answer
    x = 42,335.18

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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.