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Finding the Fourth Proportional to 78,937.16, 108,927.06 and 45,405.32

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Solution

The fourth proportional to 78,937.16, 108,927.06 and 45,405.32 is: 62,655.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,937.16 : 108,927.06 = 45,405.32 : x
  2. Step 2: Convert to fraction form
    78,937.16/108,927.06 = 45,405.32/x
  3. Step 3: Cross multiply
    78,937.16x = 108,927.06 × 45,405.32
  4. Step 4: Simplify right side
    78,937.16x = 4,945,868,015.96
  5. Step 5: Solve for x
    x = 4,945,868,015.96/78,937.16
  6. Step 6: Final answer
    x = 62,655.76

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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.