Home / 210,178.18-315,155.94-91,711.18

Finding the Fourth Proportional to 210,178.18, 315,155.94 and 91,711.18

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Solution

The fourth proportional to 210,178.18, 315,155.94 and 91,711.18 is: 137,518.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,178.18 : 315,155.94 = 91,711.18 : x
  2. Step 2: Convert to fraction form
    210,178.18/315,155.94 = 91,711.18/x
  3. Step 3: Cross multiply
    210,178.18x = 315,155.94 × 91,711.18
  4. Step 4: Simplify right side
    210,178.18x = 28,903,323,141.41
  5. Step 5: Solve for x
    x = 28,903,323,141.41/210,178.18
  6. Step 6: Final answer
    x = 137,518.19

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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.