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Finding the Fourth Proportional to 153,760.84, 212,211.04 and 90,124

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Solution

The fourth proportional to 153,760.84, 212,211.04 and 90,124 is: 124,383.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,760.84 : 212,211.04 = 90,124 : x
  2. Step 2: Convert to fraction form
    153,760.84/212,211.04 = 90,124/x
  3. Step 3: Cross multiply
    153,760.84x = 212,211.04 × 90,124
  4. Step 4: Simplify right side
    153,760.84x = 19,125,307,768.96
  5. Step 5: Solve for x
    x = 19,125,307,768.96/153,760.84
  6. Step 6: Final answer
    x = 124,383.48

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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.