Home / 128,311-177,061.96-70,946.98

Finding the Fourth Proportional to 128,311, 177,061.96 and 70,946.98

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Solution

The fourth proportional to 128,311, 177,061.96 and 70,946.98 is: 97,902.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,311 : 177,061.96 = 70,946.98 : x
  2. Step 2: Convert to fraction form
    128,311/177,061.96 = 70,946.98/x
  3. Step 3: Cross multiply
    128,311x = 177,061.96 × 70,946.98
  4. Step 4: Simplify right side
    128,311x = 12,562,011,334.88
  5. Step 5: Solve for x
    x = 12,562,011,334.88/128,311
  6. Step 6: Final answer
    x = 97,902.84

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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.