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Finding the Fourth Proportional to 128,272.98, 177,015.51 and 70,913.78

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Solution

The fourth proportional to 128,272.98, 177,015.51 and 70,913.78 is: 97,860.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,272.98 : 177,015.51 = 70,913.78 : x
  2. Step 2: Convert to fraction form
    128,272.98/177,015.51 = 70,913.78/x
  3. Step 3: Cross multiply
    128,272.98x = 177,015.51 × 70,913.78
  4. Step 4: Simplify right side
    128,272.98x = 12,552,838,047.65
  5. Step 5: Solve for x
    x = 12,552,838,047.65/128,272.98
  6. Step 6: Final answer
    x = 97,860.34

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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.