Home / 78,491,300.64-117,727,967.31-20,988,055.83

Finding the Fourth Proportional to 78,491,300.64, 117,727,967.31 and 20,988,055.83

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Solution

The fourth proportional to 78,491,300.64, 117,727,967.31 and 20,988,055.83 is: 31,479,681.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491,300.64 : 117,727,967.31 = 20,988,055.83 : x
  2. Step 2: Convert to fraction form
    78,491,300.64/117,727,967.31 = 20,988,055.83/x
  3. Step 3: Cross multiply
    78,491,300.64x = 117,727,967.31 × 20,988,055.83
  4. Step 4: Simplify right side
    78,491,300.64x = 2,470,881,151,017,469.50
  5. Step 5: Solve for x
    x = 2,470,881,151,017,469.50/78,491,300.64
  6. Step 6: Final answer
    x = 31,479,681.58

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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.