Home / 120,382.86-180,513.54-70,478.76

Finding the Fourth Proportional to 120,382.86, 180,513.54 and 70,478.76

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Solution

The fourth proportional to 120,382.86, 180,513.54 and 70,478.76 is: 105,682.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,382.86 : 180,513.54 = 70,478.76 : x
  2. Step 2: Convert to fraction form
    120,382.86/180,513.54 = 70,478.76/x
  3. Step 3: Cross multiply
    120,382.86x = 180,513.54 × 70,478.76
  4. Step 4: Simplify right side
    120,382.86x = 12,722,370,462.41
  5. Step 5: Solve for x
    x = 12,722,370,462.41/120,382.86
  6. Step 6: Final answer
    x = 105,682.57

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1.5x scale

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.