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Finding the Fourth Proportional to 156,102.77, 215,421.78 and 84,482.78

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Solution

The fourth proportional to 156,102.77, 215,421.78 and 84,482.78 is: 116,586.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,102.77 : 215,421.78 = 84,482.78 : x
  2. Step 2: Convert to fraction form
    156,102.77/215,421.78 = 84,482.78/x
  3. Step 3: Cross multiply
    156,102.77x = 215,421.78 × 84,482.78
  4. Step 4: Simplify right side
    156,102.77x = 18,199,430,846.95
  5. Step 5: Solve for x
    x = 18,199,430,846.95/156,102.77
  6. Step 6: Final answer
    x = 116,586.21

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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.