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Finding the Fourth Proportional to 103,293.35, 154,940.70 and 28,421.40

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Solution

The fourth proportional to 103,293.35, 154,940.70 and 28,421.40 is: 42,632.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,293.35 : 154,940.70 = 28,421.40 : x
  2. Step 2: Convert to fraction form
    103,293.35/154,940.70 = 28,421.40/x
  3. Step 3: Cross multiply
    103,293.35x = 154,940.70 × 28,421.40
  4. Step 4: Simplify right side
    103,293.35x = 4,403,631,610.98
  5. Step 5: Solve for x
    x = 4,403,631,610.98/103,293.35
  6. Step 6: Final answer
    x = 42,632.29

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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.