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Finding the Fourth Proportional to 112,967.01, 155,893.68 and 61,978.32

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Solution

The fourth proportional to 112,967.01, 155,893.68 and 61,978.32 is: 85,529.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,967.01 : 155,893.68 = 61,978.32 : x
  2. Step 2: Convert to fraction form
    112,967.01/155,893.68 = 61,978.32/x
  3. Step 3: Cross multiply
    112,967.01x = 155,893.68 × 61,978.32
  4. Step 4: Simplify right side
    112,967.01x = 9,662,028,385.02
  5. Step 5: Solve for x
    x = 9,662,028,385.02/112,967.01
  6. Step 6: Final answer
    x = 85,529.65

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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.