Home / 138,000.60-190,423.68-79,867.32

Finding the Fourth Proportional to 138,000.60, 190,423.68 and 79,867.32

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Solution

The fourth proportional to 138,000.60, 190,423.68 and 79,867.32 is: 110,206.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,000.60 : 190,423.68 = 79,867.32 : x
  2. Step 2: Convert to fraction form
    138,000.60/190,423.68 = 79,867.32/x
  3. Step 3: Cross multiply
    138,000.60x = 190,423.68 × 79,867.32
  4. Step 4: Simplify right side
    138,000.60x = 15,208,628,986.14
  5. Step 5: Solve for x
    x = 15,208,628,986.14/138,000.60
  6. Step 6: Final answer
    x = 110,206.98

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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.