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Finding the Fourth Proportional to 128,319, 177,073 and 70,954.96

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Solution

The fourth proportional to 128,319, 177,073 and 70,954.96 is: 97,913.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,319 : 177,073 = 70,954.96 : x
  2. Step 2: Convert to fraction form
    128,319/177,073 = 70,954.96/x
  3. Step 3: Cross multiply
    128,319x = 177,073 × 70,954.96
  4. Step 4: Simplify right side
    128,319x = 12,564,207,632.08
  5. Step 5: Solve for x
    x = 12,564,207,632.08/128,319
  6. Step 6: Final answer
    x = 97,913.85

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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.