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Finding the Fourth Proportional to 128,311.95, 177,063.39 and 70,947.93

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Solution

The fourth proportional to 128,311.95, 177,063.39 and 70,947.93 is: 97,904.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,311.95 : 177,063.39 = 70,947.93 : x
  2. Step 2: Convert to fraction form
    128,311.95/177,063.39 = 70,947.93/x
  3. Step 3: Cross multiply
    128,311.95x = 177,063.39 × 70,947.93
  4. Step 4: Simplify right side
    128,311.95x = 12,562,280,999.28
  5. Step 5: Solve for x
    x = 12,562,280,999.28/128,311.95
  6. Step 6: Final answer
    x = 97,904.22

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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.