Home / 145,289.54-217,528.26-78,490.34

Finding the Fourth Proportional to 145,289.54, 217,528.26 and 78,490.34

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Solution

The fourth proportional to 145,289.54, 217,528.26 and 78,490.34 is: 117,516.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,289.54 : 217,528.26 = 78,490.34 : x
  2. Step 2: Convert to fraction form
    145,289.54/217,528.26 = 78,490.34/x
  3. Step 3: Cross multiply
    145,289.54x = 217,528.26 × 78,490.34
  4. Step 4: Simplify right side
    145,289.54x = 17,073,867,087.01
  5. Step 5: Solve for x
    x = 17,073,867,087.01/145,289.54
  6. Step 6: Final answer
    x = 117,516.15

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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.