Home / 91,423.05-137,079.90-47,136.30

Finding the Fourth Proportional to 91,423.05, 137,079.90 and 47,136.30

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Solution

The fourth proportional to 91,423.05, 137,079.90 and 47,136.30 is: 70,676.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,423.05 : 137,079.90 = 47,136.30 : x
  2. Step 2: Convert to fraction form
    91,423.05/137,079.90 = 47,136.30/x
  3. Step 3: Cross multiply
    91,423.05x = 137,079.90 × 47,136.30
  4. Step 4: Simplify right side
    91,423.05x = 6,461,439,290.37
  5. Step 5: Solve for x
    x = 6,461,439,290.37/91,423.05
  6. Step 6: Final answer
    x = 70,676.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.