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Finding the Fourth Proportional to 90,835.60, 136,211.80 and 48,709.20

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Solution

The fourth proportional to 90,835.60, 136,211.80 and 48,709.20 is: 73,041.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,835.60 : 136,211.80 = 48,709.20 : x
  2. Step 2: Convert to fraction form
    90,835.60/136,211.80 = 48,709.20/x
  3. Step 3: Cross multiply
    90,835.60x = 136,211.80 × 48,709.20
  4. Step 4: Simplify right side
    90,835.60x = 6,634,767,808.56
  5. Step 5: Solve for x
    x = 6,634,767,808.56/90,835.60
  6. Step 6: Final answer
    x = 73,041.49

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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.