Home / 70,432.18-105,666.64-20,511.17

Finding the Fourth Proportional to 70,432.18, 105,666.64 and 20,511.17

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Solution

The fourth proportional to 70,432.18, 105,666.64 and 20,511.17 is: 30,772.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,432.18 : 105,666.64 = 20,511.17 : x
  2. Step 2: Convert to fraction form
    70,432.18/105,666.64 = 20,511.17/x
  3. Step 3: Cross multiply
    70,432.18x = 105,666.64 × 20,511.17
  4. Step 4: Simplify right side
    70,432.18x = 2,167,345,836.76
  5. Step 5: Solve for x
    x = 2,167,345,836.76/70,432.18
  6. Step 6: Final answer
    x = 30,772.10

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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.