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Finding the Fourth Proportional to 187,109.40, 280,664.10 and 128,060.40

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Solution

The fourth proportional to 187,109.40, 280,664.10 and 128,060.40 is: 192,090.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,109.40 : 280,664.10 = 128,060.40 : x
  2. Step 2: Convert to fraction form
    187,109.40/280,664.10 = 128,060.40/x
  3. Step 3: Cross multiply
    187,109.40x = 280,664.10 × 128,060.40
  4. Step 4: Simplify right side
    187,109.40x = 35,941,956,911.64
  5. Step 5: Solve for x
    x = 35,941,956,911.64/187,109.40
  6. Step 6: Final answer
    x = 192,090.60

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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.