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Finding the Fourth Proportional to 77,888.69, 107,415.82 and 51,021.40

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Solution

The fourth proportional to 77,888.69, 107,415.82 and 51,021.40 is: 70,363.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,888.69 : 107,415.82 = 51,021.40 : x
  2. Step 2: Convert to fraction form
    77,888.69/107,415.82 = 51,021.40/x
  3. Step 3: Cross multiply
    77,888.69x = 107,415.82 × 51,021.40
  4. Step 4: Simplify right side
    77,888.69x = 5,480,505,518.55
  5. Step 5: Solve for x
    x = 5,480,505,518.55/77,888.69
  6. Step 6: Final answer
    x = 70,363.30

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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.