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Finding the Fourth Proportional to 157,667.88, 217,661.94 and 121,777.32

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Solution

The fourth proportional to 157,667.88, 217,661.94 and 121,777.32 is: 168,114.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,667.88 : 217,661.94 = 121,777.32 : x
  2. Step 2: Convert to fraction form
    157,667.88/217,661.94 = 121,777.32/x
  3. Step 3: Cross multiply
    157,667.88x = 217,661.94 × 121,777.32
  4. Step 4: Simplify right side
    157,667.88x = 26,506,287,719.20
  5. Step 5: Solve for x
    x = 26,506,287,719.20/157,667.88
  6. Step 6: Final answer
    x = 168,114.70

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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.