Home / 219,465.12-302,872.24-128,825.04

Finding the Fourth Proportional to 219,465.12, 302,872.24 and 128,825.04

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Solution

The fourth proportional to 219,465.12, 302,872.24 and 128,825.04 is: 177,784.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,465.12 : 302,872.24 = 128,825.04 : x
  2. Step 2: Convert to fraction form
    219,465.12/302,872.24 = 128,825.04/x
  3. Step 3: Cross multiply
    219,465.12x = 302,872.24 × 128,825.04
  4. Step 4: Simplify right side
    219,465.12x = 39,017,528,432.89
  5. Step 5: Solve for x
    x = 39,017,528,432.89/219,465.12
  6. Step 6: Final answer
    x = 177,784.64

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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.