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Finding the Fourth Proportional to 70,931.63, 97,885.87 and 39,099.85

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Solution

The fourth proportional to 70,931.63, 97,885.87 and 39,099.85 is: 53,957.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,931.63 : 97,885.87 = 39,099.85 : x
  2. Step 2: Convert to fraction form
    70,931.63/97,885.87 = 39,099.85/x
  3. Step 3: Cross multiply
    70,931.63x = 97,885.87 × 39,099.85
  4. Step 4: Simplify right side
    70,931.63x = 3,827,322,491.66
  5. Step 5: Solve for x
    x = 3,827,322,491.66/70,931.63
  6. Step 6: Final answer
    x = 53,957.91

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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.