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Finding the Fourth Proportional to 91,898.37, 126,831.51 and 56,080.80

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Solution

The fourth proportional to 91,898.37, 126,831.51 and 56,080.80 is: 77,398.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,898.37 : 126,831.51 = 56,080.80 : x
  2. Step 2: Convert to fraction form
    91,898.37/126,831.51 = 56,080.80/x
  3. Step 3: Cross multiply
    91,898.37x = 126,831.51 × 56,080.80
  4. Step 4: Simplify right side
    91,898.37x = 7,112,812,546.01
  5. Step 5: Solve for x
    x = 7,112,812,546.01/91,898.37
  6. Step 6: Final answer
    x = 77,398.68

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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.