Home / 103,365.84-142,684.32-100,521.81

Finding the Fourth Proportional to 103,365.84, 142,684.32 and 100,521.81

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Solution

The fourth proportional to 103,365.84, 142,684.32 and 100,521.81 is: 138,758.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,365.84 : 142,684.32 = 100,521.81 : x
  2. Step 2: Convert to fraction form
    103,365.84/142,684.32 = 100,521.81/x
  3. Step 3: Cross multiply
    103,365.84x = 142,684.32 × 100,521.81
  4. Step 4: Simplify right side
    103,365.84x = 14,342,886,105.02
  5. Step 5: Solve for x
    x = 14,342,886,105.02/103,365.84
  6. Step 6: Final answer
    x = 138,758.47

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1.5x scale

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.