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Finding the Fourth Proportional to 65,341.68, 90,159.44 and 38,488.56

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Solution

The fourth proportional to 65,341.68, 90,159.44 and 38,488.56 is: 53,107.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,341.68 : 90,159.44 = 38,488.56 : x
  2. Step 2: Convert to fraction form
    65,341.68/90,159.44 = 38,488.56/x
  3. Step 3: Cross multiply
    65,341.68x = 90,159.44 × 38,488.56
  4. Step 4: Simplify right side
    65,341.68x = 3,470,107,016.01
  5. Step 5: Solve for x
    x = 3,470,107,016.01/65,341.68
  6. Step 6: Final answer
    x = 53,107.10

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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.