Home / 221,309.46-305,395.65-120,688.02

Finding the Fourth Proportional to 221,309.46, 305,395.65 and 120,688.02

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Solution

The fourth proportional to 221,309.46, 305,395.65 and 120,688.02 is: 166,543.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,309.46 : 305,395.65 = 120,688.02 : x
  2. Step 2: Convert to fraction form
    221,309.46/305,395.65 = 120,688.02/x
  3. Step 3: Cross multiply
    221,309.46x = 305,395.65 × 120,688.02
  4. Step 4: Simplify right side
    221,309.46x = 36,857,596,315.11
  5. Step 5: Solve for x
    x = 36,857,596,315.11/221,309.46
  6. Step 6: Final answer
    x = 166,543.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.