Home / 76,979.28-106,230.36-42,988.32

Finding the Fourth Proportional to 76,979.28, 106,230.36 and 42,988.32

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Solution

The fourth proportional to 76,979.28, 106,230.36 and 42,988.32 is: 59,323.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,979.28 : 106,230.36 = 42,988.32 : x
  2. Step 2: Convert to fraction form
    76,979.28/106,230.36 = 42,988.32/x
  3. Step 3: Cross multiply
    76,979.28x = 106,230.36 × 42,988.32
  4. Step 4: Simplify right side
    76,979.28x = 4,566,664,709.40
  5. Step 5: Solve for x
    x = 4,566,664,709.40/76,979.28
  6. Step 6: Final answer
    x = 59,323.30

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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.