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Finding the Fourth Proportional to 70,957.55, 97,921.13 and 39,128.19

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Solution

The fourth proportional to 70,957.55, 97,921.13 and 39,128.19 is: 53,996.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,957.55 : 97,921.13 = 39,128.19 : x
  2. Step 2: Convert to fraction form
    70,957.55/97,921.13 = 39,128.19/x
  3. Step 3: Cross multiply
    70,957.55x = 97,921.13 × 39,128.19
  4. Step 4: Simplify right side
    70,957.55x = 3,831,476,384.01
  5. Step 5: Solve for x
    x = 3,831,476,384.01/70,957.55
  6. Step 6: Final answer
    x = 53,996.74

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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.