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Finding the Fourth Proportional to 113,415.70, 170,123.55 and 100,949.80

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Solution

The fourth proportional to 113,415.70, 170,123.55 and 100,949.80 is: 151,424.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,415.70 : 170,123.55 = 100,949.80 : x
  2. Step 2: Convert to fraction form
    113,415.70/170,123.55 = 100,949.80/x
  3. Step 3: Cross multiply
    113,415.70x = 170,123.55 × 100,949.80
  4. Step 4: Simplify right side
    113,415.70x = 17,173,938,347.79
  5. Step 5: Solve for x
    x = 17,173,938,347.79/113,415.70
  6. Step 6: Final answer
    x = 151,424.70

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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.