Home / 78,102.57-107,782.06-42,292.58

Finding the Fourth Proportional to 78,102.57, 107,782.06 and 42,292.58

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Solution

The fourth proportional to 78,102.57, 107,782.06 and 42,292.58 is: 58,364.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,102.57 : 107,782.06 = 42,292.58 : x
  2. Step 2: Convert to fraction form
    78,102.57/107,782.06 = 42,292.58/x
  3. Step 3: Cross multiply
    78,102.57x = 107,782.06 × 42,292.58
  4. Step 4: Simplify right side
    78,102.57x = 4,558,381,395.11
  5. Step 5: Solve for x
    x = 4,558,381,395.11/78,102.57
  6. Step 6: Final answer
    x = 58,364.04

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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.