Home / 76,981.28-106,233.12-42,990.32

Finding the Fourth Proportional to 76,981.28, 106,233.12 and 42,990.32

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Solution

The fourth proportional to 76,981.28, 106,233.12 and 42,990.32 is: 59,326.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,981.28 : 106,233.12 = 42,990.32 : x
  2. Step 2: Convert to fraction form
    76,981.28/106,233.12 = 42,990.32/x
  3. Step 3: Cross multiply
    76,981.28x = 106,233.12 × 42,990.32
  4. Step 4: Simplify right side
    76,981.28x = 4,566,995,823.40
  5. Step 5: Solve for x
    x = 4,566,995,823.40/76,981.28
  6. Step 6: Final answer
    x = 59,326.06

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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.