Home / 315,312.72-435,129.18-172,069.62

Finding the Fourth Proportional to 315,312.72, 435,129.18 and 172,069.62

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Solution

The fourth proportional to 315,312.72, 435,129.18 and 172,069.62 is: 237,454.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,312.72 : 435,129.18 = 172,069.62 : x
  2. Step 2: Convert to fraction form
    315,312.72/435,129.18 = 172,069.62/x
  3. Step 3: Cross multiply
    315,312.72x = 435,129.18 × 172,069.62
  4. Step 4: Simplify right side
    315,312.72x = 74,872,512,653.51
  5. Step 5: Solve for x
    x = 74,872,512,653.51/315,312.72
  6. Step 6: Final answer
    x = 237,454.78

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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.