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Finding the Fourth Proportional to 163,947.40, 245,921.10 and 53,139.40

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Solution

The fourth proportional to 163,947.40, 245,921.10 and 53,139.40 is: 79,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,947.40 : 245,921.10 = 53,139.40 : x
  2. Step 2: Convert to fraction form
    163,947.40/245,921.10 = 53,139.40/x
  3. Step 3: Cross multiply
    163,947.40x = 245,921.10 × 53,139.40
  4. Step 4: Simplify right side
    163,947.40x = 13,068,099,701.34
  5. Step 5: Solve for x
    x = 13,068,099,701.34/163,947.40
  6. Step 6: Final answer
    x = 79,709.10

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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.