Home / 118,865.04-164,212.32-78,126.48

Finding the Fourth Proportional to 118,865.04, 164,212.32 and 78,126.48

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Solution

The fourth proportional to 118,865.04, 164,212.32 and 78,126.48 is: 107,931.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,865.04 : 164,212.32 = 78,126.48 : x
  2. Step 2: Convert to fraction form
    118,865.04/164,212.32 = 78,126.48/x
  3. Step 3: Cross multiply
    118,865.04x = 164,212.32 × 78,126.48
  4. Step 4: Simplify right side
    118,865.04x = 12,829,330,534.23
  5. Step 5: Solve for x
    x = 12,829,330,534.23/118,865.04
  6. Step 6: Final answer
    x = 107,931.91

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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.