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Finding the Fourth Proportional to 92,830.78, 128,106.63 and 50,389.30

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Solution

The fourth proportional to 92,830.78, 128,106.63 and 50,389.30 is: 69,537.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,830.78 : 128,106.63 = 50,389.30 : x
  2. Step 2: Convert to fraction form
    92,830.78/128,106.63 = 50,389.30/x
  3. Step 3: Cross multiply
    92,830.78x = 128,106.63 × 50,389.30
  4. Step 4: Simplify right side
    92,830.78x = 6,455,203,411.06
  5. Step 5: Solve for x
    x = 6,455,203,411.06/92,830.78
  6. Step 6: Final answer
    x = 69,537.32

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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.