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Finding the Fourth Proportional to 128,374.53, 177,151.65 and 70,230.33

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Solution

The fourth proportional to 128,374.53, 177,151.65 and 70,230.33 is: 96,915.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,374.53 : 177,151.65 = 70,230.33 : x
  2. Step 2: Convert to fraction form
    128,374.53/177,151.65 = 70,230.33/x
  3. Step 3: Cross multiply
    128,374.53x = 177,151.65 × 70,230.33
  4. Step 4: Simplify right side
    128,374.53x = 12,441,418,839.54
  5. Step 5: Solve for x
    x = 12,441,418,839.54/128,374.53
  6. Step 6: Final answer
    x = 96,915.01

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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.