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Finding the Fourth Proportional to 70,931.72, 97,885.80 and 39,101.32

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Solution

The fourth proportional to 70,931.72, 97,885.80 and 39,101.32 is: 53,959.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,931.72 : 97,885.80 = 39,101.32 : x
  2. Step 2: Convert to fraction form
    70,931.72/97,885.80 = 39,101.32/x
  3. Step 3: Cross multiply
    70,931.72x = 97,885.80 × 39,101.32
  4. Step 4: Simplify right side
    70,931.72x = 3,827,463,989.26
  5. Step 5: Solve for x
    x = 3,827,463,989.26/70,931.72
  6. Step 6: Final answer
    x = 53,959.84

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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.