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Finding the Fourth Proportional to 70,911, 97,855.98 and 39,079.23

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Solution

The fourth proportional to 70,911, 97,855.98 and 39,079.23 is: 53,928.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,911 : 97,855.98 = 39,079.23 : x
  2. Step 2: Convert to fraction form
    70,911/97,855.98 = 39,079.23/x
  3. Step 3: Cross multiply
    70,911x = 97,855.98 × 39,079.23
  4. Step 4: Simplify right side
    70,911x = 3,824,136,349.30
  5. Step 5: Solve for x
    x = 3,824,136,349.30/70,911
  6. Step 6: Final answer
    x = 53,928.68

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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.