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Finding the Fourth Proportional to 84,820.90, 127,231.35 and 76,656.10

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Solution

The fourth proportional to 84,820.90, 127,231.35 and 76,656.10 is: 114,984.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,820.90 : 127,231.35 = 76,656.10 : x
  2. Step 2: Convert to fraction form
    84,820.90/127,231.35 = 76,656.10/x
  3. Step 3: Cross multiply
    84,820.90x = 127,231.35 × 76,656.10
  4. Step 4: Simplify right side
    84,820.90x = 9,753,059,088.74
  5. Step 5: Solve for x
    x = 9,753,059,088.74/84,820.90
  6. Step 6: Final answer
    x = 114,984.15

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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.