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Finding the Fourth Proportional to 111,490, 153,856.44 and 61,188.88

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Solution

The fourth proportional to 111,490, 153,856.44 and 61,188.88 is: 84,440.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,490 : 153,856.44 = 61,188.88 : x
  2. Step 2: Convert to fraction form
    111,490/153,856.44 = 61,188.88/x
  3. Step 3: Cross multiply
    111,490x = 153,856.44 × 61,188.88
  4. Step 4: Simplify right side
    111,490x = 9,414,303,244.39
  5. Step 5: Solve for x
    x = 9,414,303,244.39/111,490
  6. Step 6: Final answer
    x = 84,440.79

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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.