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Finding the Fourth Proportional to 76,903.80, 115,355.70 and 47,225.40

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Solution

The fourth proportional to 76,903.80, 115,355.70 and 47,225.40 is: 70,838.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,903.80 : 115,355.70 = 47,225.40 : x
  2. Step 2: Convert to fraction form
    76,903.80/115,355.70 = 47,225.40/x
  3. Step 3: Cross multiply
    76,903.80x = 115,355.70 × 47,225.40
  4. Step 4: Simplify right side
    76,903.80x = 5,447,719,074.78
  5. Step 5: Solve for x
    x = 5,447,719,074.78/76,903.80
  6. Step 6: Final answer
    x = 70,838.10

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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.