Home / 210,187.20-315,280.80-131,390.40

Finding the Fourth Proportional to 210,187.20, 315,280.80 and 131,390.40

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Solution

The fourth proportional to 210,187.20, 315,280.80 and 131,390.40 is: 197,085.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,187.20 : 315,280.80 = 131,390.40 : x
  2. Step 2: Convert to fraction form
    210,187.20/315,280.80 = 131,390.40/x
  3. Step 3: Cross multiply
    210,187.20x = 315,280.80 × 131,390.40
  4. Step 4: Simplify right side
    210,187.20x = 41,424,870,424.32
  5. Step 5: Solve for x
    x = 41,424,870,424.32/210,187.20
  6. Step 6: Final answer
    x = 197,085.60

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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.