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Finding the Fourth Proportional to 139,070.10, 191,915.67 and 75,407.70

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Solution

The fourth proportional to 139,070.10, 191,915.67 and 75,407.70 is: 104,062.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,070.10 : 191,915.67 = 75,407.70 : x
  2. Step 2: Convert to fraction form
    139,070.10/191,915.67 = 75,407.70/x
  3. Step 3: Cross multiply
    139,070.10x = 191,915.67 × 75,407.70
  4. Step 4: Simplify right side
    139,070.10x = 14,471,919,268.66
  5. Step 5: Solve for x
    x = 14,471,919,268.66/139,070.10
  6. Step 6: Final answer
    x = 104,062.05

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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.