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Finding the Fourth Proportional to 215,738.60, 323,492.70 and 90,938.60

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Solution

The fourth proportional to 215,738.60, 323,492.70 and 90,938.60 is: 136,359.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,738.60 : 323,492.70 = 90,938.60 : x
  2. Step 2: Convert to fraction form
    215,738.60/323,492.70 = 90,938.60/x
  3. Step 3: Cross multiply
    215,738.60x = 323,492.70 × 90,938.60
  4. Step 4: Simplify right side
    215,738.60x = 29,417,973,248.22
  5. Step 5: Solve for x
    x = 29,417,973,248.22/215,738.60
  6. Step 6: Final answer
    x = 136,359.34

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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.