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Finding the Fourth Proportional to 70,951.57, 97,913.84 and 39,121.60

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Solution

The fourth proportional to 70,951.57, 97,913.84 and 39,121.60 is: 53,988.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,951.57 : 97,913.84 = 39,121.60 : x
  2. Step 2: Convert to fraction form
    70,951.57/97,913.84 = 39,121.60/x
  3. Step 3: Cross multiply
    70,951.57x = 97,913.84 × 39,121.60
  4. Step 4: Simplify right side
    70,951.57x = 3,830,545,887.34
  5. Step 5: Solve for x
    x = 3,830,545,887.34/70,951.57
  6. Step 6: Final answer
    x = 53,988.18

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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.