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Finding the Fourth Proportional to 111,415.40, 153,753.90 and 63,670.49

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Solution

The fourth proportional to 111,415.40, 153,753.90 and 63,670.49 is: 87,865.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,415.40 : 153,753.90 = 63,670.49 : x
  2. Step 2: Convert to fraction form
    111,415.40/153,753.90 = 63,670.49/x
  3. Step 3: Cross multiply
    111,415.40x = 153,753.90 × 63,670.49
  4. Step 4: Simplify right side
    111,415.40x = 9,789,586,152.41
  5. Step 5: Solve for x
    x = 9,789,586,152.41/111,415.40
  6. Step 6: Final answer
    x = 87,865.65

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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.