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Finding the Fourth Proportional to 72,705.60, 100,345.64 and 45,862.61

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Solution

The fourth proportional to 72,705.60, 100,345.64 and 45,862.61 is: 63,297.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,705.60 : 100,345.64 = 45,862.61 : x
  2. Step 2: Convert to fraction form
    72,705.60/100,345.64 = 45,862.61/x
  3. Step 3: Cross multiply
    72,705.60x = 100,345.64 × 45,862.61
  4. Step 4: Simplify right side
    72,705.60x = 4,602,112,221.48
  5. Step 5: Solve for x
    x = 4,602,112,221.48/72,705.60
  6. Step 6: Final answer
    x = 63,297.91

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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.