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Finding the Fourth Proportional to 187,113.90, 280,670.85 and 128,064.90

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Solution

The fourth proportional to 187,113.90, 280,670.85 and 128,064.90 is: 192,097.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,113.90 : 280,670.85 = 128,064.90 : x
  2. Step 2: Convert to fraction form
    187,113.90/280,670.85 = 128,064.90/x
  3. Step 3: Cross multiply
    187,113.90x = 280,670.85 × 128,064.90
  4. Step 4: Simplify right side
    187,113.90x = 35,944,084,338.17
  5. Step 5: Solve for x
    x = 35,944,084,338.17/187,113.90
  6. Step 6: Final answer
    x = 192,097.35

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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.