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Finding the Fourth Proportional to 128,451.56, 177,264.42 and 77,466.92

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Solution

The fourth proportional to 128,451.56, 177,264.42 and 77,466.92 is: 106,905.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,451.56 : 177,264.42 = 77,466.92 : x
  2. Step 2: Convert to fraction form
    128,451.56/177,264.42 = 77,466.92/x
  3. Step 3: Cross multiply
    128,451.56x = 177,264.42 × 77,466.92
  4. Step 4: Simplify right side
    128,451.56x = 13,732,128,642.99
  5. Step 5: Solve for x
    x = 13,732,128,642.99/128,451.56
  6. Step 6: Final answer
    x = 106,905.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.