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Finding the Fourth Proportional to 103,689.60, 143,055.84 and 58,360.32

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Solution

The fourth proportional to 103,689.60, 143,055.84 and 58,360.32 is: 80,517.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.60 : 143,055.84 = 58,360.32 : x
  2. Step 2: Convert to fraction form
    103,689.60/143,055.84 = 58,360.32/x
  3. Step 3: Cross multiply
    103,689.60x = 143,055.84 × 58,360.32
  4. Step 4: Simplify right side
    103,689.60x = 8,348,784,600.27
  5. Step 5: Solve for x
    x = 8,348,784,600.27/103,689.60
  6. Step 6: Final answer
    x = 80,517.09

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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.