Home / 78,257.61-117,403.20-31,510.53

Finding the Fourth Proportional to 78,257.61, 117,403.20 and 31,510.53

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Solution

The fourth proportional to 78,257.61, 117,403.20 and 31,510.53 is: 47,272.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,257.61 : 117,403.20 = 31,510.53 : x
  2. Step 2: Convert to fraction form
    78,257.61/117,403.20 = 31,510.53/x
  3. Step 3: Cross multiply
    78,257.61x = 117,403.20 × 31,510.53
  4. Step 4: Simplify right side
    78,257.61x = 3,699,437,055.70
  5. Step 5: Solve for x
    x = 3,699,437,055.70/78,257.61
  6. Step 6: Final answer
    x = 47,272.55

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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.