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Finding the Fourth Proportional to 106,995.51, 159,790.67 and 85,967.50

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Solution

The fourth proportional to 106,995.51, 159,790.67 and 85,967.50 is: 128,386.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,995.51 : 159,790.67 = 85,967.50 : x
  2. Step 2: Convert to fraction form
    106,995.51/159,790.67 = 85,967.50/x
  3. Step 3: Cross multiply
    106,995.51x = 159,790.67 × 85,967.50
  4. Step 4: Simplify right side
    106,995.51x = 13,736,804,423.23
  5. Step 5: Solve for x
    x = 13,736,804,423.23/106,995.51
  6. Step 6: Final answer
    x = 128,386.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.