Home / 78,457.01-117,678.85-31,059.22

Finding the Fourth Proportional to 78,457.01, 117,678.85 and 31,059.22

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Solution

The fourth proportional to 78,457.01, 117,678.85 and 31,059.22 is: 46,586.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,457.01 : 117,678.85 = 31,059.22 : x
  2. Step 2: Convert to fraction form
    78,457.01/117,678.85 = 31,059.22/x
  3. Step 3: Cross multiply
    78,457.01x = 117,678.85 × 31,059.22
  4. Step 4: Simplify right side
    78,457.01x = 3,655,013,136.20
  5. Step 5: Solve for x
    x = 3,655,013,136.20/78,457.01
  6. Step 6: Final answer
    x = 46,586.19

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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.