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Finding the Fourth Proportional to 78,155.67, 107,767.63 and 56,602.79

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Solution

The fourth proportional to 78,155.67, 107,767.63 and 56,602.79 is: 78,048.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,155.67 : 107,767.63 = 56,602.79 : x
  2. Step 2: Convert to fraction form
    78,155.67/107,767.63 = 56,602.79/x
  3. Step 3: Cross multiply
    78,155.67x = 107,767.63 × 56,602.79
  4. Step 4: Simplify right side
    78,155.67x = 6,099,948,529.69
  5. Step 5: Solve for x
    x = 6,099,948,529.69/78,155.67
  6. Step 6: Final answer
    x = 78,048.70

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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.