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Finding the Fourth Proportional to 210,384.95, 315,580.21 and 70,143.62

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Solution

The fourth proportional to 210,384.95, 315,580.21 and 70,143.62 is: 105,216.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,384.95 : 315,580.21 = 70,143.62 : x
  2. Step 2: Convert to fraction form
    210,384.95/315,580.21 = 70,143.62/x
  3. Step 3: Cross multiply
    210,384.95x = 315,580.21 × 70,143.62
  4. Step 4: Simplify right side
    210,384.95x = 22,135,938,329.76
  5. Step 5: Solve for x
    x = 22,135,938,329.76/210,384.95
  6. Step 6: Final answer
    x = 105,216.36

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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.