Home / 76,979.94-106,226.25-42,985.77

Finding the Fourth Proportional to 76,979.94, 106,226.25 and 42,985.77

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Solution

The fourth proportional to 76,979.94, 106,226.25 and 42,985.77 is: 59,316.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,979.94 : 106,226.25 = 42,985.77 : x
  2. Step 2: Convert to fraction form
    76,979.94/106,226.25 = 42,985.77/x
  3. Step 3: Cross multiply
    76,979.94x = 106,226.25 × 42,985.77
  4. Step 4: Simplify right side
    76,979.94x = 4,566,217,150.46
  5. Step 5: Solve for x
    x = 4,566,217,150.46/76,979.94
  6. Step 6: Final answer
    x = 59,316.97

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1.5x scale

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.