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Finding the Fourth Proportional to 128,334.52, 177,102.82 and 70,970.88

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Solution

The fourth proportional to 128,334.52, 177,102.82 and 70,970.88 is: 97,940.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,334.52 : 177,102.82 = 70,970.88 : x
  2. Step 2: Convert to fraction form
    128,334.52/177,102.82 = 70,970.88/x
  3. Step 3: Cross multiply
    128,334.52x = 177,102.82 × 70,970.88
  4. Step 4: Simplify right side
    128,334.52x = 12,569,142,985.88
  5. Step 5: Solve for x
    x = 12,569,142,985.88/128,334.52
  6. Step 6: Final answer
    x = 97,940.47

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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.