Home / 76,478.10-105,542.73-42,489.15

Finding the Fourth Proportional to 76,478.10, 105,542.73 and 42,489.15

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Solution

The fourth proportional to 76,478.10, 105,542.73 and 42,489.15 is: 58,636.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,478.10 : 105,542.73 = 42,489.15 : x
  2. Step 2: Convert to fraction form
    76,478.10/105,542.73 = 42,489.15/x
  3. Step 3: Cross multiply
    76,478.10x = 105,542.73 × 42,489.15
  4. Step 4: Simplify right side
    76,478.10x = 4,484,420,886.38
  5. Step 5: Solve for x
    x = 4,484,420,886.38/76,478.10
  6. Step 6: Final answer
    x = 58,636.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.