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Finding the Fourth Proportional to 210,168.80, 314,734.80 and 139,666.40

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Solution

The fourth proportional to 210,168.80, 314,734.80 and 139,666.40 is: 209,155.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,168.80 : 314,734.80 = 139,666.40 : x
  2. Step 2: Convert to fraction form
    210,168.80/314,734.80 = 139,666.40/x
  3. Step 3: Cross multiply
    210,168.80x = 314,734.80 × 139,666.40
  4. Step 4: Simplify right side
    210,168.80x = 43,957,876,470.72
  5. Step 5: Solve for x
    x = 43,957,876,470.72/210,168.80
  6. Step 6: Final answer
    x = 209,155.10

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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.