Home / 109,875.20-164,812.80-81,990.95

Finding the Fourth Proportional to 109,875.20, 164,812.80 and 81,990.95

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Solution

The fourth proportional to 109,875.20, 164,812.80 and 81,990.95 is: 122,986.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,875.20 : 164,812.80 = 81,990.95 : x
  2. Step 2: Convert to fraction form
    109,875.20/164,812.80 = 81,990.95/x
  3. Step 3: Cross multiply
    109,875.20x = 164,812.80 × 81,990.95
  4. Step 4: Simplify right side
    109,875.20x = 13,513,158,044.16
  5. Step 5: Solve for x
    x = 13,513,158,044.16/109,875.20
  6. Step 6: Final answer
    x = 122,986.43

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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.