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Finding the Fourth Proportional to 78,646.56, 108,520 and 45,106.08

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Solution

The fourth proportional to 78,646.56, 108,520 and 45,106.08 is: 62,239.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,646.56 : 108,520 = 45,106.08 : x
  2. Step 2: Convert to fraction form
    78,646.56/108,520 = 45,106.08/x
  3. Step 3: Cross multiply
    78,646.56x = 108,520 × 45,106.08
  4. Step 4: Simplify right side
    78,646.56x = 4,894,911,801.60
  5. Step 5: Solve for x
    x = 4,894,911,801.60/78,646.56
  6. Step 6: Final answer
    x = 62,239.36

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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.