Home / 163,421.35-225,496.90-91,787.65

Finding the Fourth Proportional to 163,421.35, 225,496.90 and 91,787.65

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Solution

The fourth proportional to 163,421.35, 225,496.90 and 91,787.65 is: 126,653.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,421.35 : 225,496.90 = 91,787.65 : x
  2. Step 2: Convert to fraction form
    163,421.35/225,496.90 = 91,787.65/x
  3. Step 3: Cross multiply
    163,421.35x = 225,496.90 × 91,787.65
  4. Step 4: Simplify right side
    163,421.35x = 20,697,830,533.29
  5. Step 5: Solve for x
    x = 20,697,830,533.29/163,421.35
  6. Step 6: Final answer
    x = 126,653.16

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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.