Home / 129,626.80-178,967.55-105,810.10

Finding the Fourth Proportional to 129,626.80, 178,967.55 and 105,810.10

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Solution

The fourth proportional to 129,626.80, 178,967.55 and 105,810.10 is: 146,085.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,626.80 : 178,967.55 = 105,810.10 : x
  2. Step 2: Convert to fraction form
    129,626.80/178,967.55 = 105,810.10/x
  3. Step 3: Cross multiply
    129,626.80x = 178,967.55 × 105,810.10
  4. Step 4: Simplify right side
    129,626.80x = 18,936,574,362.26
  5. Step 5: Solve for x
    x = 18,936,574,362.26/129,626.80
  6. Step 6: Final answer
    x = 146,085.33

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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.