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Finding the Fourth Proportional to 152,154.36, 209,988.71 and 87,625.71

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Solution

The fourth proportional to 152,154.36, 209,988.71 and 87,625.71 is: 120,932.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,154.36 : 209,988.71 = 87,625.71 : x
  2. Step 2: Convert to fraction form
    152,154.36/209,988.71 = 87,625.71/x
  3. Step 3: Cross multiply
    152,154.36x = 209,988.71 × 87,625.71
  4. Step 4: Simplify right side
    152,154.36x = 18,400,409,696.20
  5. Step 5: Solve for x
    x = 18,400,409,696.20/152,154.36
  6. Step 6: Final answer
    x = 120,932.52

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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.