Home / 139,518.15-209,047.18-80,403.51

Finding the Fourth Proportional to 139,518.15, 209,047.18 and 80,403.51

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Solution

The fourth proportional to 139,518.15, 209,047.18 and 80,403.51 is: 120,472.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,518.15 : 209,047.18 = 80,403.51 : x
  2. Step 2: Convert to fraction form
    139,518.15/209,047.18 = 80,403.51/x
  3. Step 3: Cross multiply
    139,518.15x = 209,047.18 × 80,403.51
  4. Step 4: Simplify right side
    139,518.15x = 16,808,125,781.36
  5. Step 5: Solve for x
    x = 16,808,125,781.36/139,518.15
  6. Step 6: Final answer
    x = 120,472.69

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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.