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Finding the Fourth Proportional to 76,104.40, 105,011.80 and 47,790.04

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Solution

The fourth proportional to 76,104.40, 105,011.80 and 47,790.04 is: 65,942.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,104.40 : 105,011.80 = 47,790.04 : x
  2. Step 2: Convert to fraction form
    76,104.40/105,011.80 = 47,790.04/x
  3. Step 3: Cross multiply
    76,104.40x = 105,011.80 × 47,790.04
  4. Step 4: Simplify right side
    76,104.40x = 5,018,518,122.47
  5. Step 5: Solve for x
    x = 5,018,518,122.47/76,104.40
  6. Step 6: Final answer
    x = 65,942.55

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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.