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Finding the Fourth Proportional to 78,617.88, 108,493.44 and 45,077.40

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Solution

The fourth proportional to 78,617.88, 108,493.44 and 45,077.40 is: 62,207.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,617.88 : 108,493.44 = 45,077.40 : x
  2. Step 2: Convert to fraction form
    78,617.88/108,493.44 = 45,077.40/x
  3. Step 3: Cross multiply
    78,617.88x = 108,493.44 × 45,077.40
  4. Step 4: Simplify right side
    78,617.88x = 4,890,602,192.26
  5. Step 5: Solve for x
    x = 4,890,602,192.26/78,617.88
  6. Step 6: Final answer
    x = 62,207.25

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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.