Home / 78,491,340.63-117,728,027.10-20,988,095.83

Finding the Fourth Proportional to 78,491,340.63, 117,728,027.10 and 20,988,095.83

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Solution

The fourth proportional to 78,491,340.63, 117,728,027.10 and 20,988,095.83 is: 31,479,741.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491,340.63 : 117,728,027.10 = 20,988,095.83 : x
  2. Step 2: Convert to fraction form
    78,491,340.63/117,728,027.10 = 20,988,095.83/x
  3. Step 3: Cross multiply
    78,491,340.63x = 117,728,027.10 × 20,988,095.83
  4. Step 4: Simplify right side
    78,491,340.63x = 2,470,887,114,357,317
  5. Step 5: Solve for x
    x = 2,470,887,114,357,317/78,491,340.63
  6. Step 6: Final answer
    x = 31,479,741.52

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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.