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Finding the Fourth Proportional to 119,889.40, 165,451.38 and 65,444.80

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Solution

The fourth proportional to 119,889.40, 165,451.38 and 65,444.80 is: 90,316.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,889.40 : 165,451.38 = 65,444.80 : x
  2. Step 2: Convert to fraction form
    119,889.40/165,451.38 = 65,444.80/x
  3. Step 3: Cross multiply
    119,889.40x = 165,451.38 × 65,444.80
  4. Step 4: Simplify right side
    119,889.40x = 10,827,932,473.82
  5. Step 5: Solve for x
    x = 10,827,932,473.82/119,889.40
  6. Step 6: Final answer
    x = 90,316.01

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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.