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Finding the Fourth Proportional to 78,638.85, 108,522.77 and 44,646.21

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Solution

The fourth proportional to 78,638.85, 108,522.77 and 44,646.21 is: 61,612.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,638.85 : 108,522.77 = 44,646.21 : x
  2. Step 2: Convert to fraction form
    78,638.85/108,522.77 = 44,646.21/x
  3. Step 3: Cross multiply
    78,638.85x = 108,522.77 × 44,646.21
  4. Step 4: Simplify right side
    78,638.85x = 4,845,130,155.97
  5. Step 5: Solve for x
    x = 4,845,130,155.97/78,638.85
  6. Step 6: Final answer
    x = 61,612.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.