Home / 255,981.60-383,975.28-78,490.08

Finding the Fourth Proportional to 255,981.60, 383,975.28 and 78,490.08

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Solution

The fourth proportional to 255,981.60, 383,975.28 and 78,490.08 is: 117,736.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,981.60 : 383,975.28 = 78,490.08 : x
  2. Step 2: Convert to fraction form
    255,981.60/383,975.28 = 78,490.08/x
  3. Step 3: Cross multiply
    255,981.60x = 383,975.28 × 78,490.08
  4. Step 4: Simplify right side
    255,981.60x = 30,138,250,445.22
  5. Step 5: Solve for x
    x = 30,138,250,445.22/255,981.60
  6. Step 6: Final answer
    x = 117,736.00

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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.