Home / 78,411.02-117,501.70-38,889.21

Finding the Fourth Proportional to 78,411.02, 117,501.70 and 38,889.21

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Solution

The fourth proportional to 78,411.02, 117,501.70 and 38,889.21 is: 58,276.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,411.02 : 117,501.70 = 38,889.21 : x
  2. Step 2: Convert to fraction form
    78,411.02/117,501.70 = 38,889.21/x
  3. Step 3: Cross multiply
    78,411.02x = 117,501.70 × 38,889.21
  4. Step 4: Simplify right side
    78,411.02x = 4,569,548,286.66
  5. Step 5: Solve for x
    x = 4,569,548,286.66/78,411.02
  6. Step 6: Final answer
    x = 58,276.86

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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.