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Finding the Fourth Proportional to 70,513.76, 105,780.54 and 20,597.52

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Solution

The fourth proportional to 70,513.76, 105,780.54 and 20,597.52 is: 30,899.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,513.76 : 105,780.54 = 20,597.52 : x
  2. Step 2: Convert to fraction form
    70,513.76/105,780.54 = 20,597.52/x
  3. Step 3: Cross multiply
    70,513.76x = 105,780.54 × 20,597.52
  4. Step 4: Simplify right side
    70,513.76x = 2,178,816,788.26
  5. Step 5: Solve for x
    x = 2,178,816,788.26/70,513.76
  6. Step 6: Final answer
    x = 30,899.17

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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.