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Finding the Fourth Proportional to 235,669.58, 325,218.71 and 128,239.91

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Solution

The fourth proportional to 235,669.58, 325,218.71 and 128,239.91 is: 176,968.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,669.58 : 325,218.71 = 128,239.91 : x
  2. Step 2: Convert to fraction form
    235,669.58/325,218.71 = 128,239.91/x
  3. Step 3: Cross multiply
    235,669.58x = 325,218.71 × 128,239.91
  4. Step 4: Simplify right side
    235,669.58x = 41,706,017,459.52
  5. Step 5: Solve for x
    x = 41,706,017,459.52/235,669.58
  6. Step 6: Final answer
    x = 176,968.18

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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.