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Finding the Fourth Proportional to 75,007.80, 112,511.70 and 30,605.40

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Solution

The fourth proportional to 75,007.80, 112,511.70 and 30,605.40 is: 45,908.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,007.80 : 112,511.70 = 30,605.40 : x
  2. Step 2: Convert to fraction form
    75,007.80/112,511.70 = 30,605.40/x
  3. Step 3: Cross multiply
    75,007.80x = 112,511.70 × 30,605.40
  4. Step 4: Simplify right side
    75,007.80x = 3,443,465,583.18
  5. Step 5: Solve for x
    x = 3,443,465,583.18/75,007.80
  6. Step 6: Final answer
    x = 45,908.10

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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.