Home / 128,310-177,060.58-70,945.98

Finding the Fourth Proportional to 128,310, 177,060.58 and 70,945.98

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Solution

The fourth proportional to 128,310, 177,060.58 and 70,945.98 is: 97,901.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,310 : 177,060.58 = 70,945.98 : x
  2. Step 2: Convert to fraction form
    128,310/177,060.58 = 70,945.98/x
  3. Step 3: Cross multiply
    128,310x = 177,060.58 × 70,945.98
  4. Step 4: Simplify right side
    128,310x = 12,561,736,367.47
  5. Step 5: Solve for x
    x = 12,561,736,367.47/128,310
  6. Step 6: Final answer
    x = 97,901.46

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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.