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Finding the Fourth Proportional to 92,780.49, 128,023.47 and 51,942.51

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Solution

The fourth proportional to 92,780.49, 128,023.47 and 51,942.51 is: 71,673.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,780.49 : 128,023.47 = 51,942.51 : x
  2. Step 2: Convert to fraction form
    92,780.49/128,023.47 = 51,942.51/x
  3. Step 3: Cross multiply
    92,780.49x = 128,023.47 × 51,942.51
  4. Step 4: Simplify right side
    92,780.49x = 6,649,860,370.71
  5. Step 5: Solve for x
    x = 6,649,860,370.71/92,780.49
  6. Step 6: Final answer
    x = 71,673.05

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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.