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Finding the Fourth Proportional to 119,887.98, 165,442.89 and 65,438.36

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Solution

The fourth proportional to 119,887.98, 165,442.89 and 65,438.36 is: 90,303.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,887.98 : 165,442.89 = 65,438.36 : x
  2. Step 2: Convert to fraction form
    119,887.98/165,442.89 = 65,438.36/x
  3. Step 3: Cross multiply
    119,887.98x = 165,442.89 × 65,438.36
  4. Step 4: Simplify right side
    119,887.98x = 10,826,310,568.05
  5. Step 5: Solve for x
    x = 10,826,310,568.05/119,887.98
  6. Step 6: Final answer
    x = 90,303.55

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1.5x scale

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.