Home / 120,865.80-181,298.70-78,875.40

Finding the Fourth Proportional to 120,865.80, 181,298.70 and 78,875.40

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Solution

The fourth proportional to 120,865.80, 181,298.70 and 78,875.40 is: 118,313.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,865.80 : 181,298.70 = 78,875.40 : x
  2. Step 2: Convert to fraction form
    120,865.80/181,298.70 = 78,875.40/x
  3. Step 3: Cross multiply
    120,865.80x = 181,298.70 × 78,875.40
  4. Step 4: Simplify right side
    120,865.80x = 14,300,007,481.98
  5. Step 5: Solve for x
    x = 14,300,007,481.98/120,865.80
  6. Step 6: Final answer
    x = 118,313.10

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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.