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Finding the Fourth Proportional to 203,681.60, 305,399.68 and 91,341.52

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Solution

The fourth proportional to 203,681.60, 305,399.68 and 91,341.52 is: 136,957.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,681.60 : 305,399.68 = 91,341.52 : x
  2. Step 2: Convert to fraction form
    203,681.60/305,399.68 = 91,341.52/x
  3. Step 3: Cross multiply
    203,681.60x = 305,399.68 × 91,341.52
  4. Step 4: Simplify right side
    203,681.60x = 27,895,670,978.71
  5. Step 5: Solve for x
    x = 27,895,670,978.71/203,681.60
  6. Step 6: Final answer
    x = 136,957.25

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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.