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Finding the Fourth Proportional to 76,804.80, 115,280.10 and 47,280.30

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Solution

The fourth proportional to 76,804.80, 115,280.10 and 47,280.30 is: 70,965.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,804.80 : 115,280.10 = 47,280.30 : x
  2. Step 2: Convert to fraction form
    76,804.80/115,280.10 = 47,280.30/x
  3. Step 3: Cross multiply
    76,804.80x = 115,280.10 × 47,280.30
  4. Step 4: Simplify right side
    76,804.80x = 5,450,477,712.03
  5. Step 5: Solve for x
    x = 5,450,477,712.03/76,804.80
  6. Step 6: Final answer
    x = 70,965.33

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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.