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Finding the Fourth Proportional to 120,445.89, 180,471.74 and 72,916.92

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Solution

The fourth proportional to 120,445.89, 180,471.74 and 72,916.92 is: 109,256.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,445.89 : 180,471.74 = 72,916.92 : x
  2. Step 2: Convert to fraction form
    120,445.89/180,471.74 = 72,916.92/x
  3. Step 3: Cross multiply
    120,445.89x = 180,471.74 × 72,916.92
  4. Step 4: Simplify right side
    120,445.89x = 13,159,443,063.26
  5. Step 5: Solve for x
    x = 13,159,443,063.26/120,445.89
  6. Step 6: Final answer
    x = 109,256.06

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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.