Home / 85,845.83-128,787.21-28,925.40

Finding the Fourth Proportional to 85,845.83, 128,787.21 and 28,925.40

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Solution

The fourth proportional to 85,845.83, 128,787.21 and 28,925.40 is: 43,394.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,845.83 : 128,787.21 = 28,925.40 : x
  2. Step 2: Convert to fraction form
    85,845.83/128,787.21 = 28,925.40/x
  3. Step 3: Cross multiply
    85,845.83x = 128,787.21 × 28,925.40
  4. Step 4: Simplify right side
    85,845.83x = 3,725,221,564.13
  5. Step 5: Solve for x
    x = 3,725,221,564.13/85,845.83
  6. Step 6: Final answer
    x = 43,394.32

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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.