Home / 123,430.20-185,145.30-113,807.40

Finding the Fourth Proportional to 123,430.20, 185,145.30 and 113,807.40

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Solution

The fourth proportional to 123,430.20, 185,145.30 and 113,807.40 is: 170,711.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,430.20 : 185,145.30 = 113,807.40 : x
  2. Step 2: Convert to fraction form
    123,430.20/185,145.30 = 113,807.40/x
  3. Step 3: Cross multiply
    123,430.20x = 185,145.30 × 113,807.40
  4. Step 4: Simplify right side
    123,430.20x = 21,070,905,215.22
  5. Step 5: Solve for x
    x = 21,070,905,215.22/123,430.20
  6. Step 6: Final answer
    x = 170,711.10

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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.