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Finding the Fourth Proportional to 119,605.80, 165,058.12 and 65,890.45

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Solution

The fourth proportional to 119,605.80, 165,058.12 and 65,890.45 is: 90,929.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,605.80 : 165,058.12 = 65,890.45 : x
  2. Step 2: Convert to fraction form
    119,605.80/165,058.12 = 65,890.45/x
  3. Step 3: Cross multiply
    119,605.80x = 165,058.12 × 65,890.45
  4. Step 4: Simplify right side
    119,605.80x = 10,875,753,802.95
  5. Step 5: Solve for x
    x = 10,875,753,802.95/119,605.80
  6. Step 6: Final answer
    x = 90,929.99

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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.