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Finding the Fourth Proportional to 70,888.76, 106,353.90 and 20,970.18

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Solution

The fourth proportional to 70,888.76, 106,353.90 and 20,970.18 is: 31,461.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,888.76 : 106,353.90 = 20,970.18 : x
  2. Step 2: Convert to fraction form
    70,888.76/106,353.90 = 20,970.18/x
  3. Step 3: Cross multiply
    70,888.76x = 106,353.90 × 20,970.18
  4. Step 4: Simplify right side
    70,888.76x = 2,230,260,426.70
  5. Step 5: Solve for x
    x = 2,230,260,426.70/70,888.76
  6. Step 6: Final answer
    x = 31,461.41

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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.