Home / 77,727.04-107,076-61,806.40

Finding the Fourth Proportional to 77,727.04, 107,076 and 61,806.40

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Solution

The fourth proportional to 77,727.04, 107,076 and 61,806.40 is: 85,143.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,727.04 : 107,076 = 61,806.40 : x
  2. Step 2: Convert to fraction form
    77,727.04/107,076 = 61,806.40/x
  3. Step 3: Cross multiply
    77,727.04x = 107,076 × 61,806.40
  4. Step 4: Simplify right side
    77,727.04x = 6,617,982,086.40
  5. Step 5: Solve for x
    x = 6,617,982,086.40/77,727.04
  6. Step 6: Final answer
    x = 85,143.88

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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.