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Finding the Fourth Proportional to 280,018.60, 420,027.90 and 102,531.40

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Solution

The fourth proportional to 280,018.60, 420,027.90 and 102,531.40 is: 153,797.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,018.60 : 420,027.90 = 102,531.40 : x
  2. Step 2: Convert to fraction form
    280,018.60/420,027.90 = 102,531.40/x
  3. Step 3: Cross multiply
    280,018.60x = 420,027.90 × 102,531.40
  4. Step 4: Simplify right side
    280,018.60x = 43,066,048,626.06
  5. Step 5: Solve for x
    x = 43,066,048,626.06/280,018.60
  6. Step 6: Final answer
    x = 153,797.10

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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.