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Finding the Fourth Proportional to 112,912.40, 169,435.80 and 42,798.80

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Solution

The fourth proportional to 112,912.40, 169,435.80 and 42,798.80 is: 64,223.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,912.40 : 169,435.80 = 42,798.80 : x
  2. Step 2: Convert to fraction form
    112,912.40/169,435.80 = 42,798.80/x
  3. Step 3: Cross multiply
    112,912.40x = 169,435.80 × 42,798.80
  4. Step 4: Simplify right side
    112,912.40x = 7,251,648,917.04
  5. Step 5: Solve for x
    x = 7,251,648,917.04/112,912.40
  6. Step 6: Final answer
    x = 64,223.67

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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.