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Finding the Fourth Proportional to 137,959.53, 190,453.04 and 90,285.69

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Solution

The fourth proportional to 137,959.53, 190,453.04 and 90,285.69 is: 124,639.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,959.53 : 190,453.04 = 90,285.69 : x
  2. Step 2: Convert to fraction form
    137,959.53/190,453.04 = 90,285.69/x
  3. Step 3: Cross multiply
    137,959.53x = 190,453.04 × 90,285.69
  4. Step 4: Simplify right side
    137,959.53x = 17,195,184,129.00
  5. Step 5: Solve for x
    x = 17,195,184,129.00/137,959.53
  6. Step 6: Final answer
    x = 124,639.34

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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.