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Finding the Fourth Proportional to 153,941.64, 212,474.88 and 90,299.94

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Solution

The fourth proportional to 153,941.64, 212,474.88 and 90,299.94 is: 124,634.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,941.64 : 212,474.88 = 90,299.94 : x
  2. Step 2: Convert to fraction form
    153,941.64/212,474.88 = 90,299.94/x
  3. Step 3: Cross multiply
    153,941.64x = 212,474.88 × 90,299.94
  4. Step 4: Simplify right side
    153,941.64x = 19,186,468,915.51
  5. Step 5: Solve for x
    x = 19,186,468,915.51/153,941.64
  6. Step 6: Final answer
    x = 124,634.69

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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.