Home / 128,533.68-177,378.29-74,055.74

Finding the Fourth Proportional to 128,533.68, 177,378.29 and 74,055.74

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Solution

The fourth proportional to 128,533.68, 177,378.29 and 74,055.74 is: 102,197.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,533.68 : 177,378.29 = 74,055.74 : x
  2. Step 2: Convert to fraction form
    128,533.68/177,378.29 = 74,055.74/x
  3. Step 3: Cross multiply
    128,533.68x = 177,378.29 × 74,055.74
  4. Step 4: Simplify right side
    128,533.68x = 13,135,881,154.47
  5. Step 5: Solve for x
    x = 13,135,881,154.47/128,533.68
  6. Step 6: Final answer
    x = 102,197.97

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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.