Home / 103,118.87-142,272.70-64,916.55

Finding the Fourth Proportional to 103,118.87, 142,272.70 and 64,916.55

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Solution

The fourth proportional to 103,118.87, 142,272.70 and 64,916.55 is: 89,565.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,118.87 : 142,272.70 = 64,916.55 : x
  2. Step 2: Convert to fraction form
    103,118.87/142,272.70 = 64,916.55/x
  3. Step 3: Cross multiply
    103,118.87x = 142,272.70 × 64,916.55
  4. Step 4: Simplify right side
    103,118.87x = 9,235,852,843.19
  5. Step 5: Solve for x
    x = 9,235,852,843.19/103,118.87
  6. Step 6: Final answer
    x = 89,565.11

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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.