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Finding the Fourth Proportional to 84,931.80, 127,397.34 and 21,751.80

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Solution

The fourth proportional to 84,931.80, 127,397.34 and 21,751.80 is: 32,627.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,931.80 : 127,397.34 = 21,751.80 : x
  2. Step 2: Convert to fraction form
    84,931.80/127,397.34 = 21,751.80/x
  3. Step 3: Cross multiply
    84,931.80x = 127,397.34 × 21,751.80
  4. Step 4: Simplify right side
    84,931.80x = 2,771,121,460.21
  5. Step 5: Solve for x
    x = 2,771,121,460.21/84,931.80
  6. Step 6: Final answer
    x = 32,627.61

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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.