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Finding the Fourth Proportional to 81,528, 112,552.38 and 63,580.02

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Solution

The fourth proportional to 81,528, 112,552.38 and 63,580.02 is: 87,774.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,528 : 112,552.38 = 63,580.02 : x
  2. Step 2: Convert to fraction form
    81,528/112,552.38 = 63,580.02/x
  3. Step 3: Cross multiply
    81,528x = 112,552.38 × 63,580.02
  4. Step 4: Simplify right side
    81,528x = 7,156,082,571.45
  5. Step 5: Solve for x
    x = 7,156,082,571.45/81,528
  6. Step 6: Final answer
    x = 87,774.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.