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Finding the Fourth Proportional to 128,238.76, 176,954.22 and 70,874.56

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Solution

The fourth proportional to 128,238.76, 176,954.22 and 70,874.56 is: 97,798.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,238.76 : 176,954.22 = 70,874.56 : x
  2. Step 2: Convert to fraction form
    128,238.76/176,954.22 = 70,874.56/x
  3. Step 3: Cross multiply
    128,238.76x = 176,954.22 × 70,874.56
  4. Step 4: Simplify right side
    128,238.76x = 12,541,552,482.64
  5. Step 5: Solve for x
    x = 12,541,552,482.64/128,238.76
  6. Step 6: Final answer
    x = 97,798.45

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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.