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Finding the Fourth Proportional to 137,900.79, 190,323.68 and 84,216.69

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Solution

The fourth proportional to 137,900.79, 190,323.68 and 84,216.69 is: 116,231.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,900.79 : 190,323.68 = 84,216.69 : x
  2. Step 2: Convert to fraction form
    137,900.79/190,323.68 = 84,216.69/x
  3. Step 3: Cross multiply
    137,900.79x = 190,323.68 × 84,216.69
  4. Step 4: Simplify right side
    137,900.79x = 16,028,429,937.14
  5. Step 5: Solve for x
    x = 16,028,429,937.14/137,900.79
  6. Step 6: Final answer
    x = 116,231.60

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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.