Home / 80,857,785.60-121,286,678.40-78,732,021.60

Finding the Fourth Proportional to 80,857,785.60, 121,286,678.40 and 78,732,021.60

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Solution

The fourth proportional to 80,857,785.60, 121,286,678.40 and 78,732,021.60 is: 118,098,032.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,857,785.60 : 121,286,678.40 = 78,732,021.60 : x
  2. Step 2: Convert to fraction form
    80,857,785.60/121,286,678.40 = 78,732,021.60/x
  3. Step 3: Cross multiply
    80,857,785.60x = 121,286,678.40 × 78,732,021.60
  4. Step 4: Simplify right side
    80,857,785.60x = 9,549,145,383,581,054
  5. Step 5: Solve for x
    x = 9,549,145,383,581,054/80,857,785.60
  6. Step 6: Final answer
    x = 118,098,032.40

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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.