Home / 145,136.56-217,703.76-78,997.12

Finding the Fourth Proportional to 145,136.56, 217,703.76 and 78,997.12

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Solution

The fourth proportional to 145,136.56, 217,703.76 and 78,997.12 is: 118,495.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,136.56 : 217,703.76 = 78,997.12 : x
  2. Step 2: Convert to fraction form
    145,136.56/217,703.76 = 78,997.12/x
  3. Step 3: Cross multiply
    145,136.56x = 217,703.76 × 78,997.12
  4. Step 4: Simplify right side
    145,136.56x = 17,197,970,053.17
  5. Step 5: Solve for x
    x = 17,197,970,053.17/145,136.56
  6. Step 6: Final answer
    x = 118,495.09

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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.