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Finding the Fourth Proportional to 85,215.40, 127,823.10 and 48,351.40

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Solution

The fourth proportional to 85,215.40, 127,823.10 and 48,351.40 is: 72,527.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,215.40 : 127,823.10 = 48,351.40 : x
  2. Step 2: Convert to fraction form
    85,215.40/127,823.10 = 48,351.40/x
  3. Step 3: Cross multiply
    85,215.40x = 127,823.10 × 48,351.40
  4. Step 4: Simplify right side
    85,215.40x = 6,180,425,837.34
  5. Step 5: Solve for x
    x = 6,180,425,837.34/85,215.40
  6. Step 6: Final answer
    x = 72,527.10

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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.