Home / 85,834,134.30-128,751,201.45-76,428,284.70

Finding the Fourth Proportional to 85,834,134.30, 128,751,201.45 and 76,428,284.70

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Solution

The fourth proportional to 85,834,134.30, 128,751,201.45 and 76,428,284.70 is: 114,642,427.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,834,134.30 : 128,751,201.45 = 76,428,284.70 : x
  2. Step 2: Convert to fraction form
    85,834,134.30/128,751,201.45 = 76,428,284.70/x
  3. Step 3: Cross multiply
    85,834,134.30x = 128,751,201.45 × 76,428,284.70
  4. Step 4: Simplify right side
    85,834,134.30x = 9,840,233,479,887,654
  5. Step 5: Solve for x
    x = 9,840,233,479,887,654/85,834,134.30
  6. Step 6: Final answer
    x = 114,642,427.05

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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.