Home / 78,510.02-117,720.33-53,580.27

Finding the Fourth Proportional to 78,510.02, 117,720.33 and 53,580.27

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Solution

The fourth proportional to 78,510.02, 117,720.33 and 53,580.27 is: 80,339.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,510.02 : 117,720.33 = 53,580.27 : x
  2. Step 2: Convert to fraction form
    78,510.02/117,720.33 = 53,580.27/x
  3. Step 3: Cross multiply
    78,510.02x = 117,720.33 × 53,580.27
  4. Step 4: Simplify right side
    78,510.02x = 6,307,487,065.89
  5. Step 5: Solve for x
    x = 6,307,487,065.89/78,510.02
  6. Step 6: Final answer
    x = 80,339.90

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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.