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Finding the Fourth Proportional to 239,686.65, 330,756.51 and 137,640.32

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Solution

The fourth proportional to 239,686.65, 330,756.51 and 137,640.32 is: 189,937.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,686.65 : 330,756.51 = 137,640.32 : x
  2. Step 2: Convert to fraction form
    239,686.65/330,756.51 = 137,640.32/x
  3. Step 3: Cross multiply
    239,686.65x = 330,756.51 × 137,640.32
  4. Step 4: Simplify right side
    239,686.65x = 45,525,431,878.48
  5. Step 5: Solve for x
    x = 45,525,431,878.48/239,686.65
  6. Step 6: Final answer
    x = 189,937.29

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1.5x scale

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.