Home / 155,943.50-215,185.89-115,129.35

Finding the Fourth Proportional to 155,943.50, 215,185.89 and 115,129.35

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Solution

The fourth proportional to 155,943.50, 215,185.89 and 115,129.35 is: 158,866.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,943.50 : 215,185.89 = 115,129.35 : x
  2. Step 2: Convert to fraction form
    155,943.50/215,185.89 = 115,129.35/x
  3. Step 3: Cross multiply
    155,943.50x = 215,185.89 × 115,129.35
  4. Step 4: Simplify right side
    155,943.50x = 24,774,211,752.81
  5. Step 5: Solve for x
    x = 24,774,211,752.81/155,943.50
  6. Step 6: Final answer
    x = 158,866.58

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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.