Home / 128,316.52-177,068.76-70,954.36

Finding the Fourth Proportional to 128,316.52, 177,068.76 and 70,954.36

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Solution

The fourth proportional to 128,316.52, 177,068.76 and 70,954.36 is: 97,912.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,316.52 : 177,068.76 = 70,954.36 : x
  2. Step 2: Convert to fraction form
    128,316.52/177,068.76 = 70,954.36/x
  3. Step 3: Cross multiply
    128,316.52x = 177,068.76 × 70,954.36
  4. Step 4: Simplify right side
    128,316.52x = 12,563,800,541.79
  5. Step 5: Solve for x
    x = 12,563,800,541.79/128,316.52
  6. Step 6: Final answer
    x = 97,912.57

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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.