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Finding the Fourth Proportional to 70,820.54, 97,733.20 and 38,991.58

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Solution

The fourth proportional to 70,820.54, 97,733.20 and 38,991.58 is: 53,808.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,820.54 : 97,733.20 = 38,991.58 : x
  2. Step 2: Convert to fraction form
    70,820.54/97,733.20 = 38,991.58/x
  3. Step 3: Cross multiply
    70,820.54x = 97,733.20 × 38,991.58
  4. Step 4: Simplify right side
    70,820.54x = 3,810,771,886.46
  5. Step 5: Solve for x
    x = 3,810,771,886.46/70,820.54
  6. Step 6: Final answer
    x = 53,808.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.