Home / 90,640,318.10-135,960,477.15-78,310,886.90

Finding the Fourth Proportional to 90,640,318.10, 135,960,477.15 and 78,310,886.90

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Solution

The fourth proportional to 90,640,318.10, 135,960,477.15 and 78,310,886.90 is: 117,466,330.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,640,318.10 : 135,960,477.15 = 78,310,886.90 : x
  2. Step 2: Convert to fraction form
    90,640,318.10/135,960,477.15 = 78,310,886.90/x
  3. Step 3: Cross multiply
    90,640,318.10x = 135,960,477.15 × 78,310,886.90
  4. Step 4: Simplify right side
    90,640,318.10x = 10,647,185,548,963,686
  5. Step 5: Solve for x
    x = 10,647,185,548,963,686/90,640,318.10
  6. Step 6: Final answer
    x = 117,466,330.35

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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.