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Finding the Fourth Proportional to 218,632.59, 301,788.47 and 128,017.68

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Solution

The fourth proportional to 218,632.59, 301,788.47 and 128,017.68 is: 176,708.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,632.59 : 301,788.47 = 128,017.68 : x
  2. Step 2: Convert to fraction form
    218,632.59/301,788.47 = 128,017.68/x
  3. Step 3: Cross multiply
    218,632.59x = 301,788.47 × 128,017.68
  4. Step 4: Simplify right side
    218,632.59x = 38,634,259,140.06
  5. Step 5: Solve for x
    x = 38,634,259,140.06/218,632.59
  6. Step 6: Final answer
    x = 176,708.61

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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.