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Finding the Fourth Proportional to 158,603.12, 218,870.25 and 90,619.58

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Solution

The fourth proportional to 158,603.12, 218,870.25 and 90,619.58 is: 125,053.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,603.12 : 218,870.25 = 90,619.58 : x
  2. Step 2: Convert to fraction form
    158,603.12/218,870.25 = 90,619.58/x
  3. Step 3: Cross multiply
    158,603.12x = 218,870.25 × 90,619.58
  4. Step 4: Simplify right side
    158,603.12x = 19,833,929,035.14
  5. Step 5: Solve for x
    x = 19,833,929,035.14/158,603.12
  6. Step 6: Final answer
    x = 125,053.84

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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.