Home / 128,021.27-176,700.98-77,762.39

Finding the Fourth Proportional to 128,021.27, 176,700.98 and 77,762.39

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Solution

The fourth proportional to 128,021.27, 176,700.98 and 77,762.39 is: 107,331.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,021.27 : 176,700.98 = 77,762.39 : x
  2. Step 2: Convert to fraction form
    128,021.27/176,700.98 = 77,762.39/x
  3. Step 3: Cross multiply
    128,021.27x = 176,700.98 × 77,762.39
  4. Step 4: Simplify right side
    128,021.27x = 13,740,690,131.33
  5. Step 5: Solve for x
    x = 13,740,690,131.33/128,021.27
  6. Step 6: Final answer
    x = 107,331.31

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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.