Home / 123,719.20-185,967.60-121,386.40

Finding the Fourth Proportional to 123,719.20, 185,967.60 and 121,386.40

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Solution

The fourth proportional to 123,719.20, 185,967.60 and 121,386.40 is: 182,461.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,719.20 : 185,967.60 = 121,386.40 : x
  2. Step 2: Convert to fraction form
    123,719.20/185,967.60 = 121,386.40/x
  3. Step 3: Cross multiply
    123,719.20x = 185,967.60 × 121,386.40
  4. Step 4: Simplify right side
    123,719.20x = 22,573,937,480.64
  5. Step 5: Solve for x
    x = 22,573,937,480.64/123,719.20
  6. Step 6: Final answer
    x = 182,461.07

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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.