Home / 217,122.40-325,875.60-128,264.80

Finding the Fourth Proportional to 217,122.40, 325,875.60 and 128,264.80

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Solution

The fourth proportional to 217,122.40, 325,875.60 and 128,264.80 is: 192,510.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,122.40 : 325,875.60 = 128,264.80 : x
  2. Step 2: Convert to fraction form
    217,122.40/325,875.60 = 128,264.80/x
  3. Step 3: Cross multiply
    217,122.40x = 325,875.60 × 128,264.80
  4. Step 4: Simplify right side
    217,122.40x = 41,798,368,658.88
  5. Step 5: Solve for x
    x = 41,798,368,658.88/217,122.40
  6. Step 6: Final answer
    x = 192,510.62

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1.5x scale

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.