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Finding the Fourth Proportional to 79,187.86, 118,803.66 and 70,483.60

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Solution

The fourth proportional to 79,187.86, 118,803.66 and 70,483.60 is: 105,744.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,187.86 : 118,803.66 = 70,483.60 : x
  2. Step 2: Convert to fraction form
    79,187.86/118,803.66 = 70,483.60/x
  3. Step 3: Cross multiply
    79,187.86x = 118,803.66 × 70,483.60
  4. Step 4: Simplify right side
    79,187.86x = 8,373,709,649.98
  5. Step 5: Solve for x
    x = 8,373,709,649.98/79,187.86
  6. Step 6: Final answer
    x = 105,744.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.