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Finding the Fourth Proportional to 130,123.70, 181,939.90 and 130,123.70

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Solution

The fourth proportional to 130,123.70, 181,939.90 and 130,123.70 is: 181,939.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,123.70 : 181,939.90 = 130,123.70 : x
  2. Step 2: Convert to fraction form
    130,123.70/181,939.90 = 130,123.70/x
  3. Step 3: Cross multiply
    130,123.70x = 181,939.90 × 130,123.70
  4. Step 4: Simplify right side
    130,123.70x = 23,674,692,965.63
  5. Step 5: Solve for x
    x = 23,674,692,965.63/130,123.70
  6. Step 6: Final answer
    x = 181,939.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.