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Finding the Fourth Proportional to 158,352.78, 218,530.38 and 90,368.40

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Solution

The fourth proportional to 158,352.78, 218,530.38 and 90,368.40 is: 124,710.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,352.78 : 218,530.38 = 90,368.40 : x
  2. Step 2: Convert to fraction form
    158,352.78/218,530.38 = 90,368.40/x
  3. Step 3: Cross multiply
    158,352.78x = 218,530.38 × 90,368.40
  4. Step 4: Simplify right side
    158,352.78x = 19,748,240,791.99
  5. Step 5: Solve for x
    x = 19,748,240,791.99/158,352.78
  6. Step 6: Final answer
    x = 124,710.41

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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.