Home / 255,109.81-382,720.07-77,612.20

Finding the Fourth Proportional to 255,109.81, 382,720.07 and 77,612.20

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Solution

The fourth proportional to 255,109.81, 382,720.07 and 77,612.20 is: 116,435.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,109.81 : 382,720.07 = 77,612.20 : x
  2. Step 2: Convert to fraction form
    255,109.81/382,720.07 = 77,612.20/x
  3. Step 3: Cross multiply
    255,109.81x = 382,720.07 × 77,612.20
  4. Step 4: Simplify right side
    255,109.81x = 29,703,747,788.60
  5. Step 5: Solve for x
    x = 29,703,747,788.60/255,109.81
  6. Step 6: Final answer
    x = 116,435.15

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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.