Home / 223,515.42-308,427.03-128,012.70

Finding the Fourth Proportional to 223,515.42, 308,427.03 and 128,012.70

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Solution

The fourth proportional to 223,515.42, 308,427.03 and 128,012.70 is: 176,643.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,515.42 : 308,427.03 = 128,012.70 : x
  2. Step 2: Convert to fraction form
    223,515.42/308,427.03 = 128,012.70/x
  3. Step 3: Cross multiply
    223,515.42x = 308,427.03 × 128,012.70
  4. Step 4: Simplify right side
    223,515.42x = 39,482,576,863.28
  5. Step 5: Solve for x
    x = 39,482,576,863.28/223,515.42
  6. Step 6: Final answer
    x = 176,643.64

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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.