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Finding the Fourth Proportional to 230,603.20, 345,904.80 and 81,012.40

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Solution

The fourth proportional to 230,603.20, 345,904.80 and 81,012.40 is: 121,518.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,603.20 : 345,904.80 = 81,012.40 : x
  2. Step 2: Convert to fraction form
    230,603.20/345,904.80 = 81,012.40/x
  3. Step 3: Cross multiply
    230,603.20x = 345,904.80 × 81,012.40
  4. Step 4: Simplify right side
    230,603.20x = 28,022,578,019.52
  5. Step 5: Solve for x
    x = 28,022,578,019.52/230,603.20
  6. Step 6: Final answer
    x = 121,518.60

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1.5x scale

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.