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Finding the Fourth Proportional to 128,299.98, 177,046.80 and 70,935.98

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Solution

The fourth proportional to 128,299.98, 177,046.80 and 70,935.98 is: 97,887.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,299.98 : 177,046.80 = 70,935.98 : x
  2. Step 2: Convert to fraction form
    128,299.98/177,046.80 = 70,935.98/x
  3. Step 3: Cross multiply
    128,299.98x = 177,046.80 × 70,935.98
  4. Step 4: Simplify right side
    128,299.98x = 12,558,988,263.86
  5. Step 5: Solve for x
    x = 12,558,988,263.86/128,299.98
  6. Step 6: Final answer
    x = 97,887.69

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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.