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Finding the Fourth Proportional to 84,208.32, 125,580.56 and 83,078.40

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Solution

The fourth proportional to 84,208.32, 125,580.56 and 83,078.40 is: 123,895.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,208.32 : 125,580.56 = 83,078.40 : x
  2. Step 2: Convert to fraction form
    84,208.32/125,580.56 = 83,078.40/x
  3. Step 3: Cross multiply
    84,208.32x = 125,580.56 × 83,078.40
  4. Step 4: Simplify right side
    84,208.32x = 10,433,031,995.90
  5. Step 5: Solve for x
    x = 10,433,031,995.90/84,208.32
  6. Step 6: Final answer
    x = 123,895.50

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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.