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Finding the Fourth Proportional to 112,492.32, 155,232.96 and 65,938.80

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Solution

The fourth proportional to 112,492.32, 155,232.96 and 65,938.80 is: 90,991.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,492.32 : 155,232.96 = 65,938.80 : x
  2. Step 2: Convert to fraction form
    112,492.32/155,232.96 = 65,938.80/x
  3. Step 3: Cross multiply
    112,492.32x = 155,232.96 × 65,938.80
  4. Step 4: Simplify right side
    112,492.32x = 10,235,875,102.85
  5. Step 5: Solve for x
    x = 10,235,875,102.85/112,492.32
  6. Step 6: Final answer
    x = 90,991.77

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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.