Home / 78,064.10-107,699.64-51,221.52

Finding the Fourth Proportional to 78,064.10, 107,699.64 and 51,221.52

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Solution

The fourth proportional to 78,064.10, 107,699.64 and 51,221.52 is: 70,666.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,064.10 : 107,699.64 = 51,221.52 : x
  2. Step 2: Convert to fraction form
    78,064.10/107,699.64 = 51,221.52/x
  3. Step 3: Cross multiply
    78,064.10x = 107,699.64 × 51,221.52
  4. Step 4: Simplify right side
    78,064.10x = 5,516,539,264.25
  5. Step 5: Solve for x
    x = 5,516,539,264.25/78,064.10
  6. Step 6: Final answer
    x = 70,666.79

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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.