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Finding the Fourth Proportional to 151,641.52, 209,197.63 and 87,942.40

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Solution

The fourth proportional to 151,641.52, 209,197.63 and 87,942.40 is: 121,321.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,641.52 : 209,197.63 = 87,942.40 : x
  2. Step 2: Convert to fraction form
    151,641.52/209,197.63 = 87,942.40/x
  3. Step 3: Cross multiply
    151,641.52x = 209,197.63 × 87,942.40
  4. Step 4: Simplify right side
    151,641.52x = 18,397,341,656.51
  5. Step 5: Solve for x
    x = 18,397,341,656.51/151,641.52
  6. Step 6: Final answer
    x = 121,321.27

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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.