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Finding the Fourth Proportional to 71,395.05, 107,259.03 and 61,430.70

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Solution

The fourth proportional to 71,395.05, 107,259.03 and 61,430.70 is: 92,289.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,395.05 : 107,259.03 = 61,430.70 : x
  2. Step 2: Convert to fraction form
    71,395.05/107,259.03 = 61,430.70/x
  3. Step 3: Cross multiply
    71,395.05x = 107,259.03 × 61,430.70
  4. Step 4: Simplify right side
    71,395.05x = 6,588,997,294.22
  5. Step 5: Solve for x
    x = 6,588,997,294.22/71,395.05
  6. Step 6: Final answer
    x = 92,289.27

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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.