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Finding the Fourth Proportional to 136,810.61, 205,342.06 and 69,389.96

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Solution

The fourth proportional to 136,810.61, 205,342.06 and 69,389.96 is: 104,148.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,810.61 : 205,342.06 = 69,389.96 : x
  2. Step 2: Convert to fraction form
    136,810.61/205,342.06 = 69,389.96/x
  3. Step 3: Cross multiply
    136,810.61x = 205,342.06 × 69,389.96
  4. Step 4: Simplify right side
    136,810.61x = 14,248,677,329.72
  5. Step 5: Solve for x
    x = 14,248,677,329.72/136,810.61
  6. Step 6: Final answer
    x = 104,148.92

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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.