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Finding the Fourth Proportional to 78,058.98, 117,088.77 and 18,894.55

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Solution

The fourth proportional to 78,058.98, 117,088.77 and 18,894.55 is: 28,341.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,058.98 : 117,088.77 = 18,894.55 : x
  2. Step 2: Convert to fraction form
    78,058.98/117,088.77 = 18,894.55/x
  3. Step 3: Cross multiply
    78,058.98x = 117,088.77 × 18,894.55
  4. Step 4: Simplify right side
    78,058.98x = 2,212,339,730.14
  5. Step 5: Solve for x
    x = 2,212,339,730.14/78,058.98
  6. Step 6: Final answer
    x = 28,341.90

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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.