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Finding the Fourth Proportional to 103,675.40, 155,513.10 and 51,187.40

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Solution

The fourth proportional to 103,675.40, 155,513.10 and 51,187.40 is: 76,781.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,675.40 : 155,513.10 = 51,187.40 : x
  2. Step 2: Convert to fraction form
    103,675.40/155,513.10 = 51,187.40/x
  3. Step 3: Cross multiply
    103,675.40x = 155,513.10 × 51,187.40
  4. Step 4: Simplify right side
    103,675.40x = 7,960,311,254.94
  5. Step 5: Solve for x
    x = 7,960,311,254.94/103,675.40
  6. Step 6: Final answer
    x = 76,781.10

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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.