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Finding the Fourth Proportional to 128,073.88, 176,743.78 and 71,485.26

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Solution

The fourth proportional to 128,073.88, 176,743.78 and 71,485.26 is: 98,650.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,073.88 : 176,743.78 = 71,485.26 : x
  2. Step 2: Convert to fraction form
    128,073.88/176,743.78 = 71,485.26/x
  3. Step 3: Cross multiply
    128,073.88x = 176,743.78 × 71,485.26
  4. Step 4: Simplify right side
    128,073.88x = 12,634,575,066.68
  5. Step 5: Solve for x
    x = 12,634,575,066.68/128,073.88
  6. Step 6: Final answer
    x = 98,650.68

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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.