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Finding the Fourth Proportional to 92,888.78, 128,239.71 and 61,149.94

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Solution

The fourth proportional to 92,888.78, 128,239.71 and 61,149.94 is: 84,421.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,888.78 : 128,239.71 = 61,149.94 : x
  2. Step 2: Convert to fraction form
    92,888.78/128,239.71 = 61,149.94/x
  3. Step 3: Cross multiply
    92,888.78x = 128,239.71 × 61,149.94
  4. Step 4: Simplify right side
    92,888.78x = 7,841,850,022.21
  5. Step 5: Solve for x
    x = 7,841,850,022.21/92,888.78
  6. Step 6: Final answer
    x = 84,421.93

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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.