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Finding the Fourth Proportional to 70,156.80, 105,281.28 and 25,783.92

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Solution

The fourth proportional to 70,156.80, 105,281.28 and 25,783.92 is: 38,692.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,156.80 : 105,281.28 = 25,783.92 : x
  2. Step 2: Convert to fraction form
    70,156.80/105,281.28 = 25,783.92/x
  3. Step 3: Cross multiply
    70,156.80x = 105,281.28 × 25,783.92
  4. Step 4: Simplify right side
    70,156.80x = 2,714,564,101.02
  5. Step 5: Solve for x
    x = 2,714,564,101.02/70,156.80
  6. Step 6: Final answer
    x = 38,692.82

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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.