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Finding the Fourth Proportional to 128,637.95, 177,525.86 and 74,914.29

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Solution

The fourth proportional to 128,637.95, 177,525.86 and 74,914.29 is: 103,384.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,637.95 : 177,525.86 = 74,914.29 : x
  2. Step 2: Convert to fraction form
    128,637.95/177,525.86 = 74,914.29/x
  3. Step 3: Cross multiply
    128,637.95x = 177,525.86 × 74,914.29
  4. Step 4: Simplify right side
    128,637.95x = 13,299,223,383.97
  5. Step 5: Solve for x
    x = 13,299,223,383.97/128,637.95
  6. Step 6: Final answer
    x = 103,384.92

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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.