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Finding the Fourth Proportional to 103,640.40, 155,345.40 and 56,926.80

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Solution

The fourth proportional to 103,640.40, 155,345.40 and 56,926.80 is: 85,326.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.40 : 155,345.40 = 56,926.80 : x
  2. Step 2: Convert to fraction form
    103,640.40/155,345.40 = 56,926.80/x
  3. Step 3: Cross multiply
    103,640.40x = 155,345.40 × 56,926.80
  4. Step 4: Simplify right side
    103,640.40x = 8,843,316,516.72
  5. Step 5: Solve for x
    x = 8,843,316,516.72/103,640.40
  6. Step 6: Final answer
    x = 85,326.92

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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.