Home / 128,299.09-177,045.61-70,935.10

Finding the Fourth Proportional to 128,299.09, 177,045.61 and 70,935.10

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Solution

The fourth proportional to 128,299.09, 177,045.61 and 70,935.10 is: 97,886.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,299.09 : 177,045.61 = 70,935.10 : x
  2. Step 2: Convert to fraction form
    128,299.09/177,045.61 = 70,935.10/x
  3. Step 3: Cross multiply
    128,299.09x = 177,045.61 × 70,935.10
  4. Step 4: Simplify right side
    128,299.09x = 12,558,746,810.01
  5. Step 5: Solve for x
    x = 12,558,746,810.01/128,299.09
  6. Step 6: Final answer
    x = 97,886.48

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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.