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Finding the Fourth Proportional to 70,209.40, 105,281.70 and 30,746.20

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Solution

The fourth proportional to 70,209.40, 105,281.70 and 30,746.20 is: 46,105.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,209.40 : 105,281.70 = 30,746.20 : x
  2. Step 2: Convert to fraction form
    70,209.40/105,281.70 = 30,746.20/x
  3. Step 3: Cross multiply
    70,209.40x = 105,281.70 × 30,746.20
  4. Step 4: Simplify right side
    70,209.40x = 3,237,012,204.54
  5. Step 5: Solve for x
    x = 3,237,012,204.54/70,209.40
  6. Step 6: Final answer
    x = 46,105.11

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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.