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Finding the Fourth Proportional to 128,847.23, 177,805.78 and 70,703.79

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Solution

The fourth proportional to 128,847.23, 177,805.78 and 70,703.79 is: 97,569.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,847.23 : 177,805.78 = 70,703.79 : x
  2. Step 2: Convert to fraction form
    128,847.23/177,805.78 = 70,703.79/x
  3. Step 3: Cross multiply
    128,847.23x = 177,805.78 × 70,703.79
  4. Step 4: Simplify right side
    128,847.23x = 12,571,541,686.38
  5. Step 5: Solve for x
    x = 12,571,541,686.38/128,847.23
  6. Step 6: Final answer
    x = 97,569.36

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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.