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Finding the Fourth Proportional to 315,093.90, 472,698.45 and 128,124.30

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Solution

The fourth proportional to 315,093.90, 472,698.45 and 128,124.30 is: 192,209.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,093.90 : 472,698.45 = 128,124.30 : x
  2. Step 2: Convert to fraction form
    315,093.90/472,698.45 = 128,124.30/x
  3. Step 3: Cross multiply
    315,093.90x = 472,698.45 × 128,124.30
  4. Step 4: Simplify right side
    315,093.90x = 60,564,158,017.34
  5. Step 5: Solve for x
    x = 60,564,158,017.34/315,093.90
  6. Step 6: Final answer
    x = 192,209.87

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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.