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Finding the Fourth Proportional to 128,041.96, 176,698.05 and 71,453.32

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Solution

The fourth proportional to 128,041.96, 176,698.05 and 71,453.32 is: 98,605.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,041.96 : 176,698.05 = 71,453.32 : x
  2. Step 2: Convert to fraction form
    128,041.96/176,698.05 = 71,453.32/x
  3. Step 3: Cross multiply
    128,041.96x = 176,698.05 × 71,453.32
  4. Step 4: Simplify right side
    128,041.96x = 12,625,662,310.03
  5. Step 5: Solve for x
    x = 12,625,662,310.03/128,041.96
  6. Step 6: Final answer
    x = 98,605.66

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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.