Home / 154,435.64-213,140.04-90,779.36

Finding the Fourth Proportional to 154,435.64, 213,140.04 and 90,779.36

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Solution

The fourth proportional to 154,435.64, 213,140.04 and 90,779.36 is: 125,286.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,435.64 : 213,140.04 = 90,779.36 : x
  2. Step 2: Convert to fraction form
    154,435.64/213,140.04 = 90,779.36/x
  3. Step 3: Cross multiply
    154,435.64x = 213,140.04 × 90,779.36
  4. Step 4: Simplify right side
    154,435.64x = 19,348,716,421.57
  5. Step 5: Solve for x
    x = 19,348,716,421.57/154,435.64
  6. Step 6: Final answer
    x = 125,286.60

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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.