Home / 74,346.30-102,456.12-72,979.74

Finding the Fourth Proportional to 74,346.30, 102,456.12 and 72,979.74

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Solution

The fourth proportional to 74,346.30, 102,456.12 and 72,979.74 is: 100,572.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,346.30 : 102,456.12 = 72,979.74 : x
  2. Step 2: Convert to fraction form
    74,346.30/102,456.12 = 72,979.74/x
  3. Step 3: Cross multiply
    74,346.30x = 102,456.12 × 72,979.74
  4. Step 4: Simplify right side
    74,346.30x = 7,477,220,999.01
  5. Step 5: Solve for x
    x = 7,477,220,999.01/74,346.30
  6. Step 6: Final answer
    x = 100,572.87

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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.