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Finding the Fourth Proportional to 139,712.70, 208,554.70 and 129,304.74

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Solution

The fourth proportional to 139,712.70, 208,554.70 and 129,304.74 is: 193,018.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,712.70 : 208,554.70 = 129,304.74 : x
  2. Step 2: Convert to fraction form
    139,712.70/208,554.70 = 129,304.74/x
  3. Step 3: Cross multiply
    139,712.70x = 208,554.70 × 129,304.74
  4. Step 4: Simplify right side
    139,712.70x = 26,967,111,259.28
  5. Step 5: Solve for x
    x = 26,967,111,259.28/139,712.70
  6. Step 6: Final answer
    x = 193,018.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.