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Finding the Fourth Proportional to 155,178.66, 214,130.66 and 87,184.82

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Solution

The fourth proportional to 155,178.66, 214,130.66 and 87,184.82 is: 120,306.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,178.66 : 214,130.66 = 87,184.82 : x
  2. Step 2: Convert to fraction form
    155,178.66/214,130.66 = 87,184.82/x
  3. Step 3: Cross multiply
    155,178.66x = 214,130.66 × 87,184.82
  4. Step 4: Simplify right side
    155,178.66x = 18,668,943,048.58
  5. Step 5: Solve for x
    x = 18,668,943,048.58/155,178.66
  6. Step 6: Final answer
    x = 120,306.12

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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.