Home / 145,823.40-218,735.10-86,628.60

Finding the Fourth Proportional to 145,823.40, 218,735.10 and 86,628.60

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Solution

The fourth proportional to 145,823.40, 218,735.10 and 86,628.60 is: 129,942.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,823.40 : 218,735.10 = 86,628.60 : x
  2. Step 2: Convert to fraction form
    145,823.40/218,735.10 = 86,628.60/x
  3. Step 3: Cross multiply
    145,823.40x = 218,735.10 × 86,628.60
  4. Step 4: Simplify right side
    145,823.40x = 18,948,715,483.86
  5. Step 5: Solve for x
    x = 18,948,715,483.86/145,823.40
  6. Step 6: Final answer
    x = 129,942.90

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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.