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Finding the Fourth Proportional to 270,643.60, 406,062.60 and 112,920.40

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Solution

The fourth proportional to 270,643.60, 406,062.60 and 112,920.40 is: 169,421.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,643.60 : 406,062.60 = 112,920.40 : x
  2. Step 2: Convert to fraction form
    270,643.60/406,062.60 = 112,920.40/x
  3. Step 3: Cross multiply
    270,643.60x = 406,062.60 × 112,920.40
  4. Step 4: Simplify right side
    270,643.60x = 45,852,751,217.04
  5. Step 5: Solve for x
    x = 45,852,751,217.04/270,643.60
  6. Step 6: Final answer
    x = 169,421.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.