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Finding the Fourth Proportional to 128,047.95, 176,722.88 and 71,471.07

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Solution

The fourth proportional to 128,047.95, 176,722.88 and 71,471.07 is: 98,639.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,047.95 : 176,722.88 = 71,471.07 : x
  2. Step 2: Convert to fraction form
    128,047.95/176,722.88 = 71,471.07/x
  3. Step 3: Cross multiply
    128,047.95x = 176,722.88 × 71,471.07
  4. Step 4: Simplify right side
    128,047.95x = 12,630,573,327.08
  5. Step 5: Solve for x
    x = 12,630,573,327.08/128,047.95
  6. Step 6: Final answer
    x = 98,639.40

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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.