Home / 78,727,429.63-118,077,685.20-21,206,248.69

Finding the Fourth Proportional to 78,727,429.63, 118,077,685.20 and 21,206,248.69

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Solution

The fourth proportional to 78,727,429.63, 118,077,685.20 and 21,206,248.69 is: 31,805,747.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,727,429.63 : 118,077,685.20 = 21,206,248.69 : x
  2. Step 2: Convert to fraction form
    78,727,429.63/118,077,685.20 = 21,206,248.69/x
  3. Step 3: Cross multiply
    78,727,429.63x = 118,077,685.20 × 21,206,248.69
  4. Step 4: Simplify right side
    78,727,429.63x = 2,503,984,757,016,933.50
  5. Step 5: Solve for x
    x = 2,503,984,757,016,933.50/78,727,429.63
  6. Step 6: Final answer
    x = 31,805,747.61

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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.