Home / 130,421.40-195,632.10-85,320.60

Finding the Fourth Proportional to 130,421.40, 195,632.10 and 85,320.60

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Solution

The fourth proportional to 130,421.40, 195,632.10 and 85,320.60 is: 127,980.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,421.40 : 195,632.10 = 85,320.60 : x
  2. Step 2: Convert to fraction form
    130,421.40/195,632.10 = 85,320.60/x
  3. Step 3: Cross multiply
    130,421.40x = 195,632.10 × 85,320.60
  4. Step 4: Simplify right side
    130,421.40x = 16,691,448,151.26
  5. Step 5: Solve for x
    x = 16,691,448,151.26/130,421.40
  6. Step 6: Final answer
    x = 127,980.90

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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.