Home / 84,935.28-127,386.18-80,720.40

Finding the Fourth Proportional to 84,935.28, 127,386.18 and 80,720.40

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Solution

The fourth proportional to 84,935.28, 127,386.18 and 80,720.40 is: 121,064.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,935.28 : 127,386.18 = 80,720.40 : x
  2. Step 2: Convert to fraction form
    84,935.28/127,386.18 = 80,720.40/x
  3. Step 3: Cross multiply
    84,935.28x = 127,386.18 × 80,720.40
  4. Step 4: Simplify right side
    84,935.28x = 10,282,663,404.07
  5. Step 5: Solve for x
    x = 10,282,663,404.07/84,935.28
  6. Step 6: Final answer
    x = 121,064.69

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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.