Home / 140,341.20-210,511.80-81,146.40

Finding the Fourth Proportional to 140,341.20, 210,511.80 and 81,146.40

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Solution

The fourth proportional to 140,341.20, 210,511.80 and 81,146.40 is: 121,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,341.20 : 210,511.80 = 81,146.40 : x
  2. Step 2: Convert to fraction form
    140,341.20/210,511.80 = 81,146.40/x
  3. Step 3: Cross multiply
    140,341.20x = 210,511.80 × 81,146.40
  4. Step 4: Simplify right side
    140,341.20x = 17,082,274,727.52
  5. Step 5: Solve for x
    x = 17,082,274,727.52/140,341.20
  6. Step 6: Final answer
    x = 121,719.60

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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.