Home / 78,110.53-117,498.40-70,803.21

Finding the Fourth Proportional to 78,110.53, 117,498.40 and 70,803.21

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Solution

The fourth proportional to 78,110.53, 117,498.40 and 70,803.21 is: 106,506.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,110.53 : 117,498.40 = 70,803.21 : x
  2. Step 2: Convert to fraction form
    78,110.53/117,498.40 = 70,803.21/x
  3. Step 3: Cross multiply
    78,110.53x = 117,498.40 × 70,803.21
  4. Step 4: Simplify right side
    78,110.53x = 8,319,264,153.47
  5. Step 5: Solve for x
    x = 8,319,264,153.47/78,110.53
  6. Step 6: Final answer
    x = 106,506.31

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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.