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Finding the Fourth Proportional to 66,312.20, 99,471.60 and 18,934.32

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Solution

The fourth proportional to 66,312.20, 99,471.60 and 18,934.32 is: 28,402.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,312.20 : 99,471.60 = 18,934.32 : x
  2. Step 2: Convert to fraction form
    66,312.20/99,471.60 = 18,934.32/x
  3. Step 3: Cross multiply
    66,312.20x = 99,471.60 × 18,934.32
  4. Step 4: Simplify right side
    66,312.20x = 1,883,426,856.63
  5. Step 5: Solve for x
    x = 1,883,426,856.63/66,312.20
  6. Step 6: Final answer
    x = 28,402.42

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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.