Home / 287,122.06-430,650.23-76,776.40

Finding the Fourth Proportional to 287,122.06, 430,650.23 and 76,776.40

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Solution

The fourth proportional to 287,122.06, 430,650.23 and 76,776.40 is: 115,155.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,122.06 : 430,650.23 = 76,776.40 : x
  2. Step 2: Convert to fraction form
    287,122.06/430,650.23 = 76,776.40/x
  3. Step 3: Cross multiply
    287,122.06x = 430,650.23 × 76,776.40
  4. Step 4: Simplify right side
    287,122.06x = 33,063,774,318.57
  5. Step 5: Solve for x
    x = 33,063,774,318.57/287,122.06
  6. Step 6: Final answer
    x = 115,155.81

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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.