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Finding the Fourth Proportional to 171,555.55, 257,048.80 and 121,386.98

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Solution

The fourth proportional to 171,555.55, 257,048.80 and 121,386.98 is: 181,879.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,555.55 : 257,048.80 = 121,386.98 : x
  2. Step 2: Convert to fraction form
    171,555.55/257,048.80 = 121,386.98/x
  3. Step 3: Cross multiply
    171,555.55x = 257,048.80 × 121,386.98
  4. Step 4: Simplify right side
    171,555.55x = 31,202,377,544.62
  5. Step 5: Solve for x
    x = 31,202,377,544.62/171,555.55
  6. Step 6: Final answer
    x = 181,879.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.