Home / 90,240.32-134,714.62-78,433.76

Finding the Fourth Proportional to 90,240.32, 134,714.62 and 78,433.76

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Solution

The fourth proportional to 90,240.32, 134,714.62 and 78,433.76 is: 117,089.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,240.32 : 134,714.62 = 78,433.76 : x
  2. Step 2: Convert to fraction form
    90,240.32/134,714.62 = 78,433.76/x
  3. Step 3: Cross multiply
    90,240.32x = 134,714.62 × 78,433.76
  4. Step 4: Simplify right side
    90,240.32x = 10,566,174,173.57
  5. Step 5: Solve for x
    x = 10,566,174,173.57/90,240.32
  6. Step 6: Final answer
    x = 117,089.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.