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Finding the Fourth Proportional to 101,394.45, 139,921.70 and 56,071.17

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Solution

The fourth proportional to 101,394.45, 139,921.70 and 56,071.17 is: 77,376.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,394.45 : 139,921.70 = 56,071.17 : x
  2. Step 2: Convert to fraction form
    101,394.45/139,921.70 = 56,071.17/x
  3. Step 3: Cross multiply
    101,394.45x = 139,921.70 × 56,071.17
  4. Step 4: Simplify right side
    101,394.45x = 7,845,573,147.03
  5. Step 5: Solve for x
    x = 7,845,573,147.03/101,394.45
  6. Step 6: Final answer
    x = 77,376.75

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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.