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Finding the Fourth Proportional to 128,263, 176,999.64 and 71,674.84

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Solution

The fourth proportional to 128,263, 176,999.64 and 71,674.84 is: 98,909.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,263 : 176,999.64 = 71,674.84 : x
  2. Step 2: Convert to fraction form
    128,263/176,999.64 = 71,674.84/x
  3. Step 3: Cross multiply
    128,263x = 176,999.64 × 71,674.84
  4. Step 4: Simplify right side
    128,263x = 12,686,420,877.06
  5. Step 5: Solve for x
    x = 12,686,420,877.06/128,263
  6. Step 6: Final answer
    x = 98,909.44

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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.