Home / 78,491,304.89-117,727,973.67-20,988,060.08

Finding the Fourth Proportional to 78,491,304.89, 117,727,973.67 and 20,988,060.08

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Solution

The fourth proportional to 78,491,304.89, 117,727,973.67 and 20,988,060.08 is: 31,479,687.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491,304.89 : 117,727,973.67 = 20,988,060.08 : x
  2. Step 2: Convert to fraction form
    78,491,304.89/117,727,973.67 = 20,988,060.08/x
  3. Step 3: Cross multiply
    78,491,304.89x = 117,727,973.67 × 20,988,060.08
  4. Step 4: Simplify right side
    78,491,304.89x = 2,470,881,784,482,618
  5. Step 5: Solve for x
    x = 2,470,881,784,482,618/78,491,304.89
  6. Step 6: Final answer
    x = 31,479,687.95

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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.