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Finding the Fourth Proportional to 78,783.65, 108,701.75 and 48,148.91

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Solution

The fourth proportional to 78,783.65, 108,701.75 and 48,148.91 is: 66,433.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,783.65 : 108,701.75 = 48,148.91 : x
  2. Step 2: Convert to fraction form
    78,783.65/108,701.75 = 48,148.91/x
  3. Step 3: Cross multiply
    78,783.65x = 108,701.75 × 48,148.91
  4. Step 4: Simplify right side
    78,783.65x = 5,233,870,234.08
  5. Step 5: Solve for x
    x = 5,233,870,234.08/78,783.65
  6. Step 6: Final answer
    x = 66,433.46

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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.