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Finding the Fourth Proportional to 143,792.40, 215,688.60 and 90,648.30

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Solution

The fourth proportional to 143,792.40, 215,688.60 and 90,648.30 is: 135,972.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,792.40 : 215,688.60 = 90,648.30 : x
  2. Step 2: Convert to fraction form
    143,792.40/215,688.60 = 90,648.30/x
  3. Step 3: Cross multiply
    143,792.40x = 215,688.60 × 90,648.30
  4. Step 4: Simplify right side
    143,792.40x = 19,551,804,919.38
  5. Step 5: Solve for x
    x = 19,551,804,919.38/143,792.40
  6. Step 6: Final answer
    x = 135,972.45

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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.