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Finding the Fourth Proportional to 147,155.63, 203,081.43 and 86,728.82

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Solution

The fourth proportional to 147,155.63, 203,081.43 and 86,728.82 is: 119,689.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,155.63 : 203,081.43 = 86,728.82 : x
  2. Step 2: Convert to fraction form
    147,155.63/203,081.43 = 86,728.82/x
  3. Step 3: Cross multiply
    147,155.63x = 203,081.43 × 86,728.82
  4. Step 4: Simplify right side
    147,155.63x = 17,613,011,772.41
  5. Step 5: Solve for x
    x = 17,613,011,772.41/147,155.63
  6. Step 6: Final answer
    x = 119,689.69

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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.