Home / 145,999.20-217,942.80-128,284.52

Finding the Fourth Proportional to 145,999.20, 217,942.80 and 128,284.52

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Solution

The fourth proportional to 145,999.20, 217,942.80 and 128,284.52 is: 191,498.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,999.20 : 217,942.80 = 128,284.52 : x
  2. Step 2: Convert to fraction form
    145,999.20/217,942.80 = 128,284.52/x
  3. Step 3: Cross multiply
    145,999.20x = 217,942.80 × 128,284.52
  4. Step 4: Simplify right side
    145,999.20x = 27,958,687,485.46
  5. Step 5: Solve for x
    x = 27,958,687,485.46/145,999.20
  6. Step 6: Final answer
    x = 191,498.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.