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Finding the Fourth Proportional to 128,043.73, 176,712.11 and 70,693.30

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Solution

The fourth proportional to 128,043.73, 176,712.11 and 70,693.30 is: 97,563.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,043.73 : 176,712.11 = 70,693.30 : x
  2. Step 2: Convert to fraction form
    128,043.73/176,712.11 = 70,693.30/x
  3. Step 3: Cross multiply
    128,043.73x = 176,712.11 × 70,693.30
  4. Step 4: Simplify right side
    128,043.73x = 12,492,362,205.86
  5. Step 5: Solve for x
    x = 12,492,362,205.86/128,043.73
  6. Step 6: Final answer
    x = 97,563.25

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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.