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Finding the Fourth Proportional to 155,756.88, 214,929.72 and 91,216.08

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Solution

The fourth proportional to 155,756.88, 214,929.72 and 91,216.08 is: 125,869.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,756.88 : 214,929.72 = 91,216.08 : x
  2. Step 2: Convert to fraction form
    155,756.88/214,929.72 = 91,216.08/x
  3. Step 3: Cross multiply
    155,756.88x = 214,929.72 × 91,216.08
  4. Step 4: Simplify right side
    155,756.88x = 19,605,046,533.90
  5. Step 5: Solve for x
    x = 19,605,046,533.90/155,756.88
  6. Step 6: Final answer
    x = 125,869.54

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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.