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Finding the Fourth Proportional to 101,343.75, 139,887.18 and 63,618

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Solution

The fourth proportional to 101,343.75, 139,887.18 and 63,618 is: 87,813.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,343.75 : 139,887.18 = 63,618 : x
  2. Step 2: Convert to fraction form
    101,343.75/139,887.18 = 63,618/x
  3. Step 3: Cross multiply
    101,343.75x = 139,887.18 × 63,618
  4. Step 4: Simplify right side
    101,343.75x = 8,899,342,617.24
  5. Step 5: Solve for x
    x = 8,899,342,617.24/101,343.75
  6. Step 6: Final answer
    x = 87,813.43

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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.