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Finding the Fourth Proportional to 158,406.60, 218,607.14 and 90,434.64

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Solution

The fourth proportional to 158,406.60, 218,607.14 and 90,434.64 is: 124,803.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,406.60 : 218,607.14 = 90,434.64 : x
  2. Step 2: Convert to fraction form
    158,406.60/218,607.14 = 90,434.64/x
  3. Step 3: Cross multiply
    158,406.60x = 218,607.14 × 90,434.64
  4. Step 4: Simplify right side
    158,406.60x = 19,769,658,007.33
  5. Step 5: Solve for x
    x = 19,769,658,007.33/158,406.60
  6. Step 6: Final answer
    x = 124,803.25

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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.