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Finding the Fourth Proportional to 93,435.86, 128,901.04 and 57,138.90

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Solution

The fourth proportional to 93,435.86, 128,901.04 and 57,138.90 is: 78,826.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,435.86 : 128,901.04 = 57,138.90 : x
  2. Step 2: Convert to fraction form
    93,435.86/128,901.04 = 57,138.90/x
  3. Step 3: Cross multiply
    93,435.86x = 128,901.04 × 57,138.90
  4. Step 4: Simplify right side
    93,435.86x = 7,365,263,634.46
  5. Step 5: Solve for x
    x = 7,365,263,634.46/93,435.86
  6. Step 6: Final answer
    x = 78,826.95

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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.