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Finding the Fourth Proportional to 187,071.40, 280,607.10 and 128,022.40

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Solution

The fourth proportional to 187,071.40, 280,607.10 and 128,022.40 is: 192,033.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,071.40 : 280,607.10 = 128,022.40 : x
  2. Step 2: Convert to fraction form
    187,071.40/280,607.10 = 128,022.40/x
  3. Step 3: Cross multiply
    187,071.40x = 280,607.10 × 128,022.40
  4. Step 4: Simplify right side
    187,071.40x = 35,923,994,399.04
  5. Step 5: Solve for x
    x = 35,923,994,399.04/187,071.40
  6. Step 6: Final answer
    x = 192,033.60

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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.