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Finding the Fourth Proportional to 139,007.10, 208,510.65 and 69,023.10

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Solution

The fourth proportional to 139,007.10, 208,510.65 and 69,023.10 is: 103,534.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,007.10 : 208,510.65 = 69,023.10 : x
  2. Step 2: Convert to fraction form
    139,007.10/208,510.65 = 69,023.10/x
  3. Step 3: Cross multiply
    139,007.10x = 208,510.65 × 69,023.10
  4. Step 4: Simplify right side
    139,007.10x = 14,392,051,446.02
  5. Step 5: Solve for x
    x = 14,392,051,446.02/139,007.10
  6. Step 6: Final answer
    x = 103,534.65

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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.