Home / 90,702.90-136,007.69-40,740.12

Finding the Fourth Proportional to 90,702.90, 136,007.69 and 40,740.12

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Solution

The fourth proportional to 90,702.90, 136,007.69 and 40,740.12 is: 61,089.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,702.90 : 136,007.69 = 40,740.12 : x
  2. Step 2: Convert to fraction form
    90,702.90/136,007.69 = 40,740.12/x
  3. Step 3: Cross multiply
    90,702.90x = 136,007.69 × 40,740.12
  4. Step 4: Simplify right side
    90,702.90x = 5,540,969,407.82
  5. Step 5: Solve for x
    x = 5,540,969,407.82/90,702.90
  6. Step 6: Final answer
    x = 61,089.22

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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.