Home / 315,261.40-472,892.10-128,176.60

Finding the Fourth Proportional to 315,261.40, 472,892.10 and 128,176.60

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Solution

The fourth proportional to 315,261.40, 472,892.10 and 128,176.60 is: 192,264.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,261.40 : 472,892.10 = 128,176.60 : x
  2. Step 2: Convert to fraction form
    315,261.40/472,892.10 = 128,176.60/x
  3. Step 3: Cross multiply
    315,261.40x = 472,892.10 × 128,176.60
  4. Step 4: Simplify right side
    315,261.40x = 60,613,701,544.86
  5. Step 5: Solve for x
    x = 60,613,701,544.86/315,261.40
  6. Step 6: Final answer
    x = 192,264.90

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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.