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Finding the Fourth Proportional to 115,590.40, 161,619.20 and 115,590.40

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Solution

The fourth proportional to 115,590.40, 161,619.20 and 115,590.40 is: 161,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,590.40 : 161,619.20 = 115,590.40 : x
  2. Step 2: Convert to fraction form
    115,590.40/161,619.20 = 115,590.40/x
  3. Step 3: Cross multiply
    115,590.40x = 161,619.20 × 115,590.40
  4. Step 4: Simplify right side
    115,590.40x = 18,681,627,975.68
  5. Step 5: Solve for x
    x = 18,681,627,975.68/115,590.40
  6. Step 6: Final answer
    x = 161,619.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.