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Finding the Fourth Proportional to 155,038.70, 213,950.68 and 87,056.21

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Solution

The fourth proportional to 155,038.70, 213,950.68 and 87,056.21 is: 120,136.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,038.70 : 213,950.68 = 87,056.21 : x
  2. Step 2: Convert to fraction form
    155,038.70/213,950.68 = 87,056.21/x
  3. Step 3: Cross multiply
    155,038.70x = 213,950.68 × 87,056.21
  4. Step 4: Simplify right side
    155,038.70x = 18,625,735,327.72
  5. Step 5: Solve for x
    x = 18,625,735,327.72/155,038.70
  6. Step 6: Final answer
    x = 120,136.04

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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.