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Finding the Fourth Proportional to 78,573.80, 108,470.58 and 61,548.68

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Solution

The fourth proportional to 78,573.80, 108,470.58 and 61,548.68 is: 84,967.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,573.80 : 108,470.58 = 61,548.68 : x
  2. Step 2: Convert to fraction form
    78,573.80/108,470.58 = 61,548.68/x
  3. Step 3: Cross multiply
    78,573.80x = 108,470.58 × 61,548.68
  4. Step 4: Simplify right side
    78,573.80x = 6,676,221,017.83
  5. Step 5: Solve for x
    x = 6,676,221,017.83/78,573.80
  6. Step 6: Final answer
    x = 84,967.52

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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.