Home / 91,146.81-125,749.37-56,689.28

Finding the Fourth Proportional to 91,146.81, 125,749.37 and 56,689.28

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Solution

The fourth proportional to 91,146.81, 125,749.37 and 56,689.28 is: 78,210.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,146.81 : 125,749.37 = 56,689.28 : x
  2. Step 2: Convert to fraction form
    91,146.81/125,749.37 = 56,689.28/x
  3. Step 3: Cross multiply
    91,146.81x = 125,749.37 × 56,689.28
  4. Step 4: Simplify right side
    91,146.81x = 7,128,640,758.73
  5. Step 5: Solve for x
    x = 7,128,640,758.73/91,146.81
  6. Step 6: Final answer
    x = 78,210.53

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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.