Home / 78,539.47-116,920.91-78,072.40

Finding the Fourth Proportional to 78,539.47, 116,920.91 and 78,072.40

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Solution

The fourth proportional to 78,539.47, 116,920.91 and 78,072.40 is: 116,225.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,539.47 : 116,920.91 = 78,072.40 : x
  2. Step 2: Convert to fraction form
    78,539.47/116,920.91 = 78,072.40/x
  3. Step 3: Cross multiply
    78,539.47x = 116,920.91 × 78,072.40
  4. Step 4: Simplify right side
    78,539.47x = 9,128,296,053.88
  5. Step 5: Solve for x
    x = 9,128,296,053.88/78,539.47
  6. Step 6: Final answer
    x = 116,225.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.