Home / 205,487.90-308,037.45-121,312.70

Finding the Fourth Proportional to 205,487.90, 308,037.45 and 121,312.70

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Solution

The fourth proportional to 205,487.90, 308,037.45 and 121,312.70 is: 181,854.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,487.90 : 308,037.45 = 121,312.70 : x
  2. Step 2: Convert to fraction form
    205,487.90/308,037.45 = 121,312.70/x
  3. Step 3: Cross multiply
    205,487.90x = 308,037.45 × 121,312.70
  4. Step 4: Simplify right side
    205,487.90x = 37,368,854,760.62
  5. Step 5: Solve for x
    x = 37,368,854,760.62/205,487.90
  6. Step 6: Final answer
    x = 181,854.28

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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.