Home / 120,876,129.28-166,804,204.80-65,870,813.44

Finding the Fourth Proportional to 120,876,129.28, 166,804,204.80 and 65,870,813.44

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Solution

The fourth proportional to 120,876,129.28, 166,804,204.80 and 65,870,813.44 is: 90,899,077.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,876,129.28 : 166,804,204.80 = 65,870,813.44 : x
  2. Step 2: Convert to fraction form
    120,876,129.28/166,804,204.80 = 65,870,813.44/x
  3. Step 3: Cross multiply
    120,876,129.28x = 166,804,204.80 × 65,870,813.44
  4. Step 4: Simplify right side
    120,876,129.28x = 10,987,528,655,388,352
  5. Step 5: Solve for x
    x = 10,987,528,655,388,352/120,876,129.28
  6. Step 6: Final answer
    x = 90,899,077.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.