Home / 81,316-121,816.16-59,929.84

Finding the Fourth Proportional to 81,316, 121,816.16 and 59,929.84

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Solution

The fourth proportional to 81,316, 121,816.16 and 59,929.84 is: 89,778.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,316 : 121,816.16 = 59,929.84 : x
  2. Step 2: Convert to fraction form
    81,316/121,816.16 = 59,929.84/x
  3. Step 3: Cross multiply
    81,316x = 121,816.16 × 59,929.84
  4. Step 4: Simplify right side
    81,316x = 7,300,422,978.21
  5. Step 5: Solve for x
    x = 7,300,422,978.21/81,316
  6. Step 6: Final answer
    x = 89,778.43

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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.