Home / 315,080.12-472,617.75-78,421.21

Finding the Fourth Proportional to 315,080.12, 472,617.75 and 78,421.21

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Solution

The fourth proportional to 315,080.12, 472,617.75 and 78,421.21 is: 117,631.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,080.12 : 472,617.75 = 78,421.21 : x
  2. Step 2: Convert to fraction form
    315,080.12/472,617.75 = 78,421.21/x
  3. Step 3: Cross multiply
    315,080.12x = 472,617.75 × 78,421.21
  4. Step 4: Simplify right side
    315,080.12x = 37,063,255,822.48
  5. Step 5: Solve for x
    x = 37,063,255,822.48/315,080.12
  6. Step 6: Final answer
    x = 117,631.21

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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.