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Finding the Fourth Proportional to 280,047.78, 420,126.35 and 90,555.17

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Solution

The fourth proportional to 280,047.78, 420,126.35 and 90,555.17 is: 135,850.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,047.78 : 420,126.35 = 90,555.17 : x
  2. Step 2: Convert to fraction form
    280,047.78/420,126.35 = 90,555.17/x
  3. Step 3: Cross multiply
    280,047.78x = 420,126.35 × 90,555.17
  4. Step 4: Simplify right side
    280,047.78x = 38,044,610,492.32
  5. Step 5: Solve for x
    x = 38,044,610,492.32/280,047.78
  6. Step 6: Final answer
    x = 135,850.43

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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.