Home / 315,312.34-435,140.20-172,081.60

Finding the Fourth Proportional to 315,312.34, 435,140.20 and 172,081.60

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Solution

The fourth proportional to 315,312.34, 435,140.20 and 172,081.60 is: 237,477.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,312.34 : 435,140.20 = 172,081.60 : x
  2. Step 2: Convert to fraction form
    315,312.34/435,140.20 = 172,081.60/x
  3. Step 3: Cross multiply
    315,312.34x = 435,140.20 × 172,081.60
  4. Step 4: Simplify right side
    315,312.34x = 74,879,621,840.32
  5. Step 5: Solve for x
    x = 74,879,621,840.32/315,312.34
  6. Step 6: Final answer
    x = 237,477.61

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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.