Home / 78,790.46-108,730.66-42,980.48

Finding the Fourth Proportional to 78,790.46, 108,730.66 and 42,980.48

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Solution

The fourth proportional to 78,790.46, 108,730.66 and 42,980.48 is: 59,312.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,790.46 : 108,730.66 = 42,980.48 : x
  2. Step 2: Convert to fraction form
    78,790.46/108,730.66 = 42,980.48/x
  3. Step 3: Cross multiply
    78,790.46x = 108,730.66 × 42,980.48
  4. Step 4: Simplify right side
    78,790.46x = 4,673,295,957.52
  5. Step 5: Solve for x
    x = 4,673,295,957.52/78,790.46
  6. Step 6: Final answer
    x = 59,312.97

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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.