Home / 78,256.11-117,121.73-64,215.57

Finding the Fourth Proportional to 78,256.11, 117,121.73 and 64,215.57

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Solution

The fourth proportional to 78,256.11, 117,121.73 and 64,215.57 is: 96,108.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,256.11 : 117,121.73 = 64,215.57 : x
  2. Step 2: Convert to fraction form
    78,256.11/117,121.73 = 64,215.57/x
  3. Step 3: Cross multiply
    78,256.11x = 117,121.73 × 64,215.57
  4. Step 4: Simplify right side
    78,256.11x = 7,521,038,330.26
  5. Step 5: Solve for x
    x = 7,521,038,330.26/78,256.11
  6. Step 6: Final answer
    x = 96,108.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.