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Finding the Fourth Proportional to 128,851.49, 193,090.70 and 88,829.39

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Solution

The fourth proportional to 128,851.49, 193,090.70 and 88,829.39 is: 133,115.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,851.49 : 193,090.70 = 88,829.39 : x
  2. Step 2: Convert to fraction form
    128,851.49/193,090.70 = 88,829.39/x
  3. Step 3: Cross multiply
    128,851.49x = 193,090.70 × 88,829.39
  4. Step 4: Simplify right side
    128,851.49x = 17,152,129,800.47
  5. Step 5: Solve for x
    x = 17,152,129,800.47/128,851.49
  6. Step 6: Final answer
    x = 133,115.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.