Home / 118,749.60-163,985.46-76,381.68

Finding the Fourth Proportional to 118,749.60, 163,985.46 and 76,381.68

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Solution

The fourth proportional to 118,749.60, 163,985.46 and 76,381.68 is: 105,478.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,749.60 : 163,985.46 = 76,381.68 : x
  2. Step 2: Convert to fraction form
    118,749.60/163,985.46 = 76,381.68/x
  3. Step 3: Cross multiply
    118,749.60x = 163,985.46 × 76,381.68
  4. Step 4: Simplify right side
    118,749.60x = 12,525,484,930.37
  5. Step 5: Solve for x
    x = 12,525,484,930.37/118,749.60
  6. Step 6: Final answer
    x = 105,478.12

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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.