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Finding the Fourth Proportional to 85,559.50, 127,712.57 and 75,459.30

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Solution

The fourth proportional to 85,559.50, 127,712.57 and 75,459.30 is: 112,636.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,559.50 : 127,712.57 = 75,459.30 : x
  2. Step 2: Convert to fraction form
    85,559.50/127,712.57 = 75,459.30/x
  3. Step 3: Cross multiply
    85,559.50x = 127,712.57 × 75,459.30
  4. Step 4: Simplify right side
    85,559.50x = 9,637,101,133.40
  5. Step 5: Solve for x
    x = 9,637,101,133.40/85,559.50
  6. Step 6: Final answer
    x = 112,636.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.