Home / 103,430.72-155,142.98-28,555.44

Finding the Fourth Proportional to 103,430.72, 155,142.98 and 28,555.44

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Solution

The fourth proportional to 103,430.72, 155,142.98 and 28,555.44 is: 42,832.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,430.72 : 155,142.98 = 28,555.44 : x
  2. Step 2: Convert to fraction form
    103,430.72/155,142.98 = 28,555.44/x
  3. Step 3: Cross multiply
    103,430.72x = 155,142.98 × 28,555.44
  4. Step 4: Simplify right side
    103,430.72x = 4,430,175,352.48
  5. Step 5: Solve for x
    x = 4,430,175,352.48/103,430.72
  6. Step 6: Final answer
    x = 42,832.30

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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.