Home / 136,688.20-205,064.70-70,138.60

Finding the Fourth Proportional to 136,688.20, 205,064.70 and 70,138.60

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Solution

The fourth proportional to 136,688.20, 205,064.70 and 70,138.60 is: 105,224.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,688.20 : 205,064.70 = 70,138.60 : x
  2. Step 2: Convert to fraction form
    136,688.20/205,064.70 = 70,138.60/x
  3. Step 3: Cross multiply
    136,688.20x = 205,064.70 × 70,138.60
  4. Step 4: Simplify right side
    136,688.20x = 14,382,950,967.42
  5. Step 5: Solve for x
    x = 14,382,950,967.42/136,688.20
  6. Step 6: Final answer
    x = 105,224.53

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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.