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Finding the Fourth Proportional to 91,980.84, 126,929.82 and 56,230.68

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Solution

The fourth proportional to 91,980.84, 126,929.82 and 56,230.68 is: 77,596.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,980.84 : 126,929.82 = 56,230.68 : x
  2. Step 2: Convert to fraction form
    91,980.84/126,929.82 = 56,230.68/x
  3. Step 3: Cross multiply
    91,980.84x = 126,929.82 × 56,230.68
  4. Step 4: Simplify right side
    91,980.84x = 7,137,350,090.88
  5. Step 5: Solve for x
    x = 7,137,350,090.88/91,980.84
  6. Step 6: Final answer
    x = 77,596.05

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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.