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Finding the Fourth Proportional to 220,681.87, 304,572.00 and 128,831.28

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Solution

The fourth proportional to 220,681.87, 304,572.00 and 128,831.28 is: 177,805.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,681.87 : 304,572.00 = 128,831.28 : x
  2. Step 2: Convert to fraction form
    220,681.87/304,572.00 = 128,831.28/x
  3. Step 3: Cross multiply
    220,681.87x = 304,572.00 × 128,831.28
  4. Step 4: Simplify right side
    220,681.87x = 39,238,399,228.46
  5. Step 5: Solve for x
    x = 39,238,399,228.46/220,681.87
  6. Step 6: Final answer
    x = 177,805.27

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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.