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Finding the Fourth Proportional to 60,687.90, 91,041.12 and 18,558.18

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Solution

The fourth proportional to 60,687.90, 91,041.12 and 18,558.18 is: 27,840.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,687.90 : 91,041.12 = 18,558.18 : x
  2. Step 2: Convert to fraction form
    60,687.90/91,041.12 = 18,558.18/x
  3. Step 3: Cross multiply
    60,687.90x = 91,041.12 × 18,558.18
  4. Step 4: Simplify right side
    60,687.90x = 1,689,557,492.36
  5. Step 5: Solve for x
    x = 1,689,557,492.36/60,687.90
  6. Step 6: Final answer
    x = 27,840.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.