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Finding the Fourth Proportional to 91,298.92, 136,970.16 and 28,969.44

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Solution

The fourth proportional to 91,298.92, 136,970.16 and 28,969.44 is: 43,461.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,298.92 : 136,970.16 = 28,969.44 : x
  2. Step 2: Convert to fraction form
    91,298.92/136,970.16 = 28,969.44/x
  3. Step 3: Cross multiply
    91,298.92x = 136,970.16 × 28,969.44
  4. Step 4: Simplify right side
    91,298.92x = 3,967,948,831.91
  5. Step 5: Solve for x
    x = 3,967,948,831.91/91,298.92
  6. Step 6: Final answer
    x = 43,461.07

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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.