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Finding the Fourth Proportional to 103,492.70, 155,209 and 40,298.70

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Solution

The fourth proportional to 103,492.70, 155,209 and 40,298.70 is: 60,436.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,492.70 : 155,209 = 40,298.70 : x
  2. Step 2: Convert to fraction form
    103,492.70/155,209 = 40,298.70/x
  3. Step 3: Cross multiply
    103,492.70x = 155,209 × 40,298.70
  4. Step 4: Simplify right side
    103,492.70x = 6,254,720,928.30
  5. Step 5: Solve for x
    x = 6,254,720,928.30/103,492.70
  6. Step 6: Final answer
    x = 60,436.35

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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.