Home / 113,129.88-156,110.10-65,386.32

Finding the Fourth Proportional to 113,129.88, 156,110.10 and 65,386.32

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Solution

The fourth proportional to 113,129.88, 156,110.10 and 65,386.32 is: 90,227.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,129.88 : 156,110.10 = 65,386.32 : x
  2. Step 2: Convert to fraction form
    113,129.88/156,110.10 = 65,386.32/x
  3. Step 3: Cross multiply
    113,129.88x = 156,110.10 × 65,386.32
  4. Step 4: Simplify right side
    113,129.88x = 10,207,464,953.83
  5. Step 5: Solve for x
    x = 10,207,464,953.83/113,129.88
  6. Step 6: Final answer
    x = 90,227.84

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1.5x scale

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.