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Finding the Fourth Proportional to 139,688.20, 209,532.30 and 127,222.30

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Solution

The fourth proportional to 139,688.20, 209,532.30 and 127,222.30 is: 190,833.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,688.20 : 209,532.30 = 127,222.30 : x
  2. Step 2: Convert to fraction form
    139,688.20/209,532.30 = 127,222.30/x
  3. Step 3: Cross multiply
    139,688.20x = 209,532.30 × 127,222.30
  4. Step 4: Simplify right side
    139,688.20x = 26,657,181,130.29
  5. Step 5: Solve for x
    x = 26,657,181,130.29/139,688.20
  6. Step 6: Final answer
    x = 190,833.45

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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.