Home / 151,439.28-208,880.28-128,621.04

Finding the Fourth Proportional to 151,439.28, 208,880.28 and 128,621.04

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Solution

The fourth proportional to 151,439.28, 208,880.28 and 128,621.04 is: 177,407.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,439.28 : 208,880.28 = 128,621.04 : x
  2. Step 2: Convert to fraction form
    151,439.28/208,880.28 = 128,621.04/x
  3. Step 3: Cross multiply
    151,439.28x = 208,880.28 × 128,621.04
  4. Step 4: Simplify right side
    151,439.28x = 26,866,398,849.09
  5. Step 5: Solve for x
    x = 26,866,398,849.09/151,439.28
  6. Step 6: Final answer
    x = 177,407.07

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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.