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Finding the Fourth Proportional to 188,420.70, 260,017.62 and 103,535.94

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Solution

The fourth proportional to 188,420.70, 260,017.62 and 103,535.94 is: 142,877.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,420.70 : 260,017.62 = 103,535.94 : x
  2. Step 2: Convert to fraction form
    188,420.70/260,017.62 = 103,535.94/x
  3. Step 3: Cross multiply
    188,420.70x = 260,017.62 × 103,535.94
  4. Step 4: Simplify right side
    188,420.70x = 26,921,168,703.26
  5. Step 5: Solve for x
    x = 26,921,168,703.26/188,420.70
  6. Step 6: Final answer
    x = 142,877.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.