Home / 78,218,878.80-117,328,318.20-49,308,488.40

Finding the Fourth Proportional to 78,218,878.80, 117,328,318.20 and 49,308,488.40

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Solution

The fourth proportional to 78,218,878.80, 117,328,318.20 and 49,308,488.40 is: 73,962,732.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,218,878.80 : 117,328,318.20 = 49,308,488.40 : x
  2. Step 2: Convert to fraction form
    78,218,878.80/117,328,318.20 = 49,308,488.40/x
  3. Step 3: Cross multiply
    78,218,878.80x = 117,328,318.20 × 49,308,488.40
  4. Step 4: Simplify right side
    78,218,878.80x = 5,785,282,016,956,209
  5. Step 5: Solve for x
    x = 5,785,282,016,956,209/78,218,878.80
  6. Step 6: Final answer
    x = 73,962,732.60

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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.