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Finding the Fourth Proportional to 105,396.70, 145,445.73 and 57,649.63

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Solution

The fourth proportional to 105,396.70, 145,445.73 and 57,649.63 is: 79,555.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,396.70 : 145,445.73 = 57,649.63 : x
  2. Step 2: Convert to fraction form
    105,396.70/145,445.73 = 57,649.63/x
  3. Step 3: Cross multiply
    105,396.70x = 145,445.73 × 57,649.63
  4. Step 4: Simplify right side
    105,396.70x = 8,384,891,792.35
  5. Step 5: Solve for x
    x = 8,384,891,792.35/105,396.70
  6. Step 6: Final answer
    x = 79,555.55

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1.5x scale

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.