Home / 77,990.61-116,981.28-21,829.47

Finding the Fourth Proportional to 77,990.61, 116,981.28 and 21,829.47

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Solution

The fourth proportional to 77,990.61, 116,981.28 and 21,829.47 is: 32,742.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,990.61 : 116,981.28 = 21,829.47 : x
  2. Step 2: Convert to fraction form
    77,990.61/116,981.28 = 21,829.47/x
  3. Step 3: Cross multiply
    77,990.61x = 116,981.28 × 21,829.47
  4. Step 4: Simplify right side
    77,990.61x = 2,553,639,342.32
  5. Step 5: Solve for x
    x = 2,553,639,342.32/77,990.61
  6. Step 6: Final answer
    x = 32,742.91

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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.