Home / 115,461.40-173,192.10-78,136.60

Finding the Fourth Proportional to 115,461.40, 173,192.10 and 78,136.60

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Solution

The fourth proportional to 115,461.40, 173,192.10 and 78,136.60 is: 117,204.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,461.40 : 173,192.10 = 78,136.60 : x
  2. Step 2: Convert to fraction form
    115,461.40/173,192.10 = 78,136.60/x
  3. Step 3: Cross multiply
    115,461.40x = 173,192.10 × 78,136.60
  4. Step 4: Simplify right side
    115,461.40x = 13,532,641,840.86
  5. Step 5: Solve for x
    x = 13,532,641,840.86/115,461.40
  6. Step 6: Final answer
    x = 117,204.90

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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.