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Finding the Fourth Proportional to 245,426.70, 368,140.05 and 138,701.10

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Solution

The fourth proportional to 245,426.70, 368,140.05 and 138,701.10 is: 208,051.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,426.70 : 368,140.05 = 138,701.10 : x
  2. Step 2: Convert to fraction form
    245,426.70/368,140.05 = 138,701.10/x
  3. Step 3: Cross multiply
    245,426.70x = 368,140.05 × 138,701.10
  4. Step 4: Simplify right side
    245,426.70x = 51,061,429,889.06
  5. Step 5: Solve for x
    x = 51,061,429,889.06/245,426.70
  6. Step 6: Final answer
    x = 208,051.65

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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.