Home / 305,128.21-457,692.33-118,139.71

Finding the Fourth Proportional to 305,128.21, 457,692.33 and 118,139.71

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Solution

The fourth proportional to 305,128.21, 457,692.33 and 118,139.71 is: 177,209.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,128.21 : 457,692.33 = 118,139.71 : x
  2. Step 2: Convert to fraction form
    305,128.21/457,692.33 = 118,139.71/x
  3. Step 3: Cross multiply
    305,128.21x = 457,692.33 × 118,139.71
  4. Step 4: Simplify right side
    305,128.21x = 54,071,639,135.42
  5. Step 5: Solve for x
    x = 54,071,639,135.42/305,128.21
  6. Step 6: Final answer
    x = 177,209.57

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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.