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Finding the Fourth Proportional to 85,339.78, 117,730.77 and 51,328.28

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Solution

The fourth proportional to 85,339.78, 117,730.77 and 51,328.28 is: 70,810.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,339.78 : 117,730.77 = 51,328.28 : x
  2. Step 2: Convert to fraction form
    85,339.78/117,730.77 = 51,328.28/x
  3. Step 3: Cross multiply
    85,339.78x = 117,730.77 × 51,328.28
  4. Step 4: Simplify right side
    85,339.78x = 6,042,918,029.02
  5. Step 5: Solve for x
    x = 6,042,918,029.02/85,339.78
  6. Step 6: Final answer
    x = 70,810.10

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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.