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Finding the Fourth Proportional to 156,417.98, 215,855.43 and 87,506.69

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Solution

The fourth proportional to 156,417.98, 215,855.43 and 87,506.69 is: 120,758.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,417.98 : 215,855.43 = 87,506.69 : x
  2. Step 2: Convert to fraction form
    156,417.98/215,855.43 = 87,506.69/x
  3. Step 3: Cross multiply
    156,417.98x = 215,855.43 × 87,506.69
  4. Step 4: Simplify right side
    156,417.98x = 18,888,794,197.83
  5. Step 5: Solve for x
    x = 18,888,794,197.83/156,417.98
  6. Step 6: Final answer
    x = 120,758.46

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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.