Home / 128,611.53-177,494.76-74,913.39

Finding the Fourth Proportional to 128,611.53, 177,494.76 and 74,913.39

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Solution

The fourth proportional to 128,611.53, 177,494.76 and 74,913.39 is: 103,386.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,611.53 : 177,494.76 = 74,913.39 : x
  2. Step 2: Convert to fraction form
    128,611.53/177,494.76 = 74,913.39/x
  3. Step 3: Cross multiply
    128,611.53x = 177,494.76 × 74,913.39
  4. Step 4: Simplify right side
    128,611.53x = 13,296,734,178.84
  5. Step 5: Solve for x
    x = 13,296,734,178.84/128,611.53
  6. Step 6: Final answer
    x = 103,386.80

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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.