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Finding the Fourth Proportional to 119,661.57, 165,109.59 and 90,973.80

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Solution

The fourth proportional to 119,661.57, 165,109.59 and 90,973.80 is: 125,526.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,661.57 : 165,109.59 = 90,973.80 : x
  2. Step 2: Convert to fraction form
    119,661.57/165,109.59 = 90,973.80/x
  3. Step 3: Cross multiply
    119,661.57x = 165,109.59 × 90,973.80
  4. Step 4: Simplify right side
    119,661.57x = 15,020,646,818.74
  5. Step 5: Solve for x
    x = 15,020,646,818.74/119,661.57
  6. Step 6: Final answer
    x = 125,526.07

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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.