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Finding the Fourth Proportional to 47,830.80, 71,746.20 and 30,320.40

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Solution

The fourth proportional to 47,830.80, 71,746.20 and 30,320.40 is: 45,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,830.80 : 71,746.20 = 30,320.40 : x
  2. Step 2: Convert to fraction form
    47,830.80/71,746.20 = 30,320.40/x
  3. Step 3: Cross multiply
    47,830.80x = 71,746.20 × 30,320.40
  4. Step 4: Simplify right side
    47,830.80x = 2,175,373,482.48
  5. Step 5: Solve for x
    x = 2,175,373,482.48/47,830.80
  6. Step 6: Final answer
    x = 45,480.60

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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.