Home / 140,320.20-210,480.30-81,125.40

Finding the Fourth Proportional to 140,320.20, 210,480.30 and 81,125.40

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Solution

The fourth proportional to 140,320.20, 210,480.30 and 81,125.40 is: 121,688.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,320.20 : 210,480.30 = 81,125.40 : x
  2. Step 2: Convert to fraction form
    140,320.20/210,480.30 = 81,125.40/x
  3. Step 3: Cross multiply
    140,320.20x = 210,480.30 × 81,125.40
  4. Step 4: Simplify right side
    140,320.20x = 17,075,298,529.62
  5. Step 5: Solve for x
    x = 17,075,298,529.62/140,320.20
  6. Step 6: Final answer
    x = 121,688.10

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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.