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Finding the Fourth Proportional to 124,420.50, 171,704.61 and 70,707.78

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Solution

The fourth proportional to 124,420.50, 171,704.61 and 70,707.78 is: 97,579.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,420.50 : 171,704.61 = 70,707.78 : x
  2. Step 2: Convert to fraction form
    124,420.50/171,704.61 = 70,707.78/x
  3. Step 3: Cross multiply
    124,420.50x = 171,704.61 × 70,707.78
  4. Step 4: Simplify right side
    124,420.50x = 12,140,851,788.87
  5. Step 5: Solve for x
    x = 12,140,851,788.87/124,420.50
  6. Step 6: Final answer
    x = 97,579.19

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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.