Home / 90,857,782.40-136,286,673.60-54,578,076.80

Finding the Fourth Proportional to 90,857,782.40, 136,286,673.60 and 54,578,076.80

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Solution

The fourth proportional to 90,857,782.40, 136,286,673.60 and 54,578,076.80 is: 81,867,115.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,857,782.40 : 136,286,673.60 = 54,578,076.80 : x
  2. Step 2: Convert to fraction form
    90,857,782.40/136,286,673.60 = 54,578,076.80/x
  3. Step 3: Cross multiply
    90,857,782.40x = 136,286,673.60 × 54,578,076.80
  4. Step 4: Simplify right side
    90,857,782.40x = 7,438,264,538,557,332
  5. Step 5: Solve for x
    x = 7,438,264,538,557,332/90,857,782.40
  6. Step 6: Final answer
    x = 81,867,115.20

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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.