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Finding the Fourth Proportional to 85,130.79, 127,774.89 and 43,040.49

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Solution

The fourth proportional to 85,130.79, 127,774.89 and 43,040.49 is: 64,600.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,130.79 : 127,774.89 = 43,040.49 : x
  2. Step 2: Convert to fraction form
    85,130.79/127,774.89 = 43,040.49/x
  3. Step 3: Cross multiply
    85,130.79x = 127,774.89 × 43,040.49
  4. Step 4: Simplify right side
    85,130.79x = 5,499,493,875.30
  5. Step 5: Solve for x
    x = 5,499,493,875.30/85,130.79
  6. Step 6: Final answer
    x = 64,600.53

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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.