Home / 129,143.64-178,146.27-120,010.32

Finding the Fourth Proportional to 129,143.64, 178,146.27 and 120,010.32

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Solution

The fourth proportional to 129,143.64, 178,146.27 and 120,010.32 is: 165,547.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,143.64 : 178,146.27 = 120,010.32 : x
  2. Step 2: Convert to fraction form
    129,143.64/178,146.27 = 120,010.32/x
  3. Step 3: Cross multiply
    129,143.64x = 178,146.27 × 120,010.32
  4. Step 4: Simplify right side
    129,143.64x = 21,379,390,869.51
  5. Step 5: Solve for x
    x = 21,379,390,869.51/129,143.64
  6. Step 6: Final answer
    x = 165,547.38

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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.