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Finding the Fourth Proportional to 128,048.10, 176,716.17 and 70,698.48

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Solution

The fourth proportional to 128,048.10, 176,716.17 and 70,698.48 is: 97,569.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,048.10 : 176,716.17 = 70,698.48 : x
  2. Step 2: Convert to fraction form
    128,048.10/176,716.17 = 70,698.48/x
  3. Step 3: Cross multiply
    128,048.10x = 176,716.17 × 70,698.48
  4. Step 4: Simplify right side
    128,048.10x = 12,493,564,610.42
  5. Step 5: Solve for x
    x = 12,493,564,610.42/128,048.10
  6. Step 6: Final answer
    x = 97,569.31

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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.