Home / 85,834,506.30-128,751,759.45-76,428,656.70

Finding the Fourth Proportional to 85,834,506.30, 128,751,759.45 and 76,428,656.70

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Solution

The fourth proportional to 85,834,506.30, 128,751,759.45 and 76,428,656.70 is: 114,642,985.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,834,506.30 : 128,751,759.45 = 76,428,656.70 : x
  2. Step 2: Convert to fraction form
    85,834,506.30/128,751,759.45 = 76,428,656.70/x
  3. Step 3: Cross multiply
    85,834,506.30x = 128,751,759.45 × 76,428,656.70
  4. Step 4: Simplify right side
    85,834,506.30x = 9,840,324,022,525,032
  5. Step 5: Solve for x
    x = 9,840,324,022,525,032/85,834,506.30
  6. Step 6: Final answer
    x = 114,642,985.05

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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.