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Finding the Fourth Proportional to 119,895.85, 165,455.47 and 65,447.80

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Solution

The fourth proportional to 119,895.85, 165,455.47 and 65,447.80 is: 90,317.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,895.85 : 165,455.47 = 65,447.80 : x
  2. Step 2: Convert to fraction form
    119,895.85/165,455.47 = 65,447.80/x
  3. Step 3: Cross multiply
    119,895.85x = 165,455.47 × 65,447.80
  4. Step 4: Simplify right side
    119,895.85x = 10,828,695,354.95
  5. Step 5: Solve for x
    x = 10,828,695,354.95/119,895.85
  6. Step 6: Final answer
    x = 90,317.52

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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.