Home / 78,875.91-118,321.30-61,126.45

Finding the Fourth Proportional to 78,875.91, 118,321.30 and 61,126.45

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Solution

The fourth proportional to 78,875.91, 118,321.30 and 61,126.45 is: 91,695.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,875.91 : 118,321.30 = 61,126.45 : x
  2. Step 2: Convert to fraction form
    78,875.91/118,321.30 = 61,126.45/x
  3. Step 3: Cross multiply
    78,875.91x = 118,321.30 × 61,126.45
  4. Step 4: Simplify right side
    78,875.91x = 7,232,561,313.69
  5. Step 5: Solve for x
    x = 7,232,561,313.69/78,875.91
  6. Step 6: Final answer
    x = 91,695.44

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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.