Home / 128,637.72-177,528.24-72,052.56

Finding the Fourth Proportional to 128,637.72, 177,528.24 and 72,052.56

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Solution

The fourth proportional to 128,637.72, 177,528.24 and 72,052.56 is: 99,437.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,637.72 : 177,528.24 = 72,052.56 : x
  2. Step 2: Convert to fraction form
    128,637.72/177,528.24 = 72,052.56/x
  3. Step 3: Cross multiply
    128,637.72x = 177,528.24 × 72,052.56
  4. Step 4: Simplify right side
    128,637.72x = 12,791,364,164.29
  5. Step 5: Solve for x
    x = 12,791,364,164.29/128,637.72
  6. Step 6: Final answer
    x = 99,437.12

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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.