Home / 210,293.08-315,128.58-139,917.40

Finding the Fourth Proportional to 210,293.08, 315,128.58 and 139,917.40

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Solution

The fourth proportional to 210,293.08, 315,128.58 and 139,917.40 is: 209,669.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,293.08 : 315,128.58 = 139,917.40 : x
  2. Step 2: Convert to fraction form
    210,293.08/315,128.58 = 139,917.40/x
  3. Step 3: Cross multiply
    210,293.08x = 315,128.58 × 139,917.40
  4. Step 4: Simplify right side
    210,293.08x = 44,091,971,579.29
  5. Step 5: Solve for x
    x = 44,091,971,579.29/210,293.08
  6. Step 6: Final answer
    x = 209,669.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.