Home / 97,438.20-145,865.70-86,940.60

Finding the Fourth Proportional to 97,438.20, 145,865.70 and 86,940.60

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Solution

The fourth proportional to 97,438.20, 145,865.70 and 86,940.60 is: 130,150.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,438.20 : 145,865.70 = 86,940.60 : x
  2. Step 2: Convert to fraction form
    97,438.20/145,865.70 = 86,940.60/x
  3. Step 3: Cross multiply
    97,438.20x = 145,865.70 × 86,940.60
  4. Step 4: Simplify right side
    97,438.20x = 12,681,651,477.42
  5. Step 5: Solve for x
    x = 12,681,651,477.42/97,438.20
  6. Step 6: Final answer
    x = 130,150.72

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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.