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Finding the Fourth Proportional to 128,293.49, 177,041.96 and 71,710.13

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Solution

The fourth proportional to 128,293.49, 177,041.96 and 71,710.13 is: 98,958.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,293.49 : 177,041.96 = 71,710.13 : x
  2. Step 2: Convert to fraction form
    128,293.49/177,041.96 = 71,710.13/x
  3. Step 3: Cross multiply
    128,293.49x = 177,041.96 × 71,710.13
  4. Step 4: Simplify right side
    128,293.49x = 12,695,701,967.05
  5. Step 5: Solve for x
    x = 12,695,701,967.05/128,293.49
  6. Step 6: Final answer
    x = 98,958.27

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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.