Home / 78,491,303.89-117,727,972.17-20,988,059.08

Finding the Fourth Proportional to 78,491,303.89, 117,727,972.17 and 20,988,059.08

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Solution

The fourth proportional to 78,491,303.89, 117,727,972.17 and 20,988,059.08 is: 31,479,686.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491,303.89 : 117,727,972.17 = 20,988,059.08 : x
  2. Step 2: Convert to fraction form
    78,491,303.89/117,727,972.17 = 20,988,059.08/x
  3. Step 3: Cross multiply
    78,491,303.89x = 117,727,972.17 × 20,988,059.08
  4. Step 4: Simplify right side
    78,491,303.89x = 2,470,881,635,272,555.50
  5. Step 5: Solve for x
    x = 2,470,881,635,272,555.50/78,491,303.89
  6. Step 6: Final answer
    x = 31,479,686.45

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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.