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Finding the Fourth Proportional to 315,128.50, 472,692.75 and 93,512.50

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Solution

The fourth proportional to 315,128.50, 472,692.75 and 93,512.50 is: 140,268.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,128.50 : 472,692.75 = 93,512.50 : x
  2. Step 2: Convert to fraction form
    315,128.50/472,692.75 = 93,512.50/x
  3. Step 3: Cross multiply
    315,128.50x = 472,692.75 × 93,512.50
  4. Step 4: Simplify right side
    315,128.50x = 44,202,680,784.38
  5. Step 5: Solve for x
    x = 44,202,680,784.38/315,128.50
  6. Step 6: Final answer
    x = 140,268.75

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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.