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Finding the Fourth Proportional to 155,653.20, 233,479.80 and 76,921.20

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Solution

The fourth proportional to 155,653.20, 233,479.80 and 76,921.20 is: 115,381.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,653.20 : 233,479.80 = 76,921.20 : x
  2. Step 2: Convert to fraction form
    155,653.20/233,479.80 = 76,921.20/x
  3. Step 3: Cross multiply
    155,653.20x = 233,479.80 × 76,921.20
  4. Step 4: Simplify right side
    155,653.20x = 17,959,546,391.76
  5. Step 5: Solve for x
    x = 17,959,546,391.76/155,653.20
  6. Step 6: Final answer
    x = 115,381.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.