Home / 78,491,313.59-117,727,986.63-20,988,068.79

Finding the Fourth Proportional to 78,491,313.59, 117,727,986.63 and 20,988,068.79

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Solution

The fourth proportional to 78,491,313.59, 117,727,986.63 and 20,988,068.79 is: 31,479,700.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491,313.59 : 117,727,986.63 = 20,988,068.79 : x
  2. Step 2: Convert to fraction form
    78,491,313.59/117,727,986.63 = 20,988,068.79/x
  3. Step 3: Cross multiply
    78,491,313.59x = 117,727,986.63 × 20,988,068.79
  4. Step 4: Simplify right side
    78,491,313.59x = 2,470,883,081,425,437
  5. Step 5: Solve for x
    x = 2,470,883,081,425,437/78,491,313.59
  6. Step 6: Final answer
    x = 31,479,700.98

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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.