Home / 128,338.47-177,101.96-70,974.05

Finding the Fourth Proportional to 128,338.47, 177,101.96 and 70,974.05

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Solution

The fourth proportional to 128,338.47, 177,101.96 and 70,974.05 is: 97,941.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,338.47 : 177,101.96 = 70,974.05 : x
  2. Step 2: Convert to fraction form
    128,338.47/177,101.96 = 70,974.05/x
  3. Step 3: Cross multiply
    128,338.47x = 177,101.96 × 70,974.05
  4. Step 4: Simplify right side
    128,338.47x = 12,569,642,123.76
  5. Step 5: Solve for x
    x = 12,569,642,123.76/128,338.47
  6. Step 6: Final answer
    x = 97,941.34

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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.