Home / 154,140.10-212,714.81-90,478.96

Finding the Fourth Proportional to 154,140.10, 212,714.81 and 90,478.96

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Solution

The fourth proportional to 154,140.10, 212,714.81 and 90,478.96 is: 124,861.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,140.10 : 212,714.81 = 90,478.96 : x
  2. Step 2: Convert to fraction form
    154,140.10/212,714.81 = 90,478.96/x
  3. Step 3: Cross multiply
    154,140.10x = 212,714.81 × 90,478.96
  4. Step 4: Simplify right side
    154,140.10x = 19,246,214,140.51
  5. Step 5: Solve for x
    x = 19,246,214,140.51/154,140.10
  6. Step 6: Final answer
    x = 124,861.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.