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Finding the Fourth Proportional to 189,069.71, 260,912.85 and 103,029.45

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Solution

The fourth proportional to 189,069.71, 260,912.85 and 103,029.45 is: 142,178.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,069.71 : 260,912.85 = 103,029.45 : x
  2. Step 2: Convert to fraction form
    189,069.71/260,912.85 = 103,029.45/x
  3. Step 3: Cross multiply
    189,069.71x = 260,912.85 × 103,029.45
  4. Step 4: Simplify right side
    189,069.71x = 26,881,706,068.65
  5. Step 5: Solve for x
    x = 26,881,706,068.65/189,069.71
  6. Step 6: Final answer
    x = 142,178.81

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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.