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Finding the Fourth Proportional to 78,212.66, 107,533.81 and 69,633.14

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Solution

The fourth proportional to 78,212.66, 107,533.81 and 69,633.14 is: 95,737.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,212.66 : 107,533.81 = 69,633.14 : x
  2. Step 2: Convert to fraction form
    78,212.66/107,533.81 = 69,633.14/x
  3. Step 3: Cross multiply
    78,212.66x = 107,533.81 × 69,633.14
  4. Step 4: Simplify right side
    78,212.66x = 7,487,916,846.46
  5. Step 5: Solve for x
    x = 7,487,916,846.46/78,212.66
  6. Step 6: Final answer
    x = 95,737.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.