Home / 129,011.13-178,032.74-72,422.51

Finding the Fourth Proportional to 129,011.13, 178,032.74 and 72,422.51

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Solution

The fourth proportional to 129,011.13, 178,032.74 and 72,422.51 is: 99,941.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,011.13 : 178,032.74 = 72,422.51 : x
  2. Step 2: Convert to fraction form
    129,011.13/178,032.74 = 72,422.51/x
  3. Step 3: Cross multiply
    129,011.13x = 178,032.74 × 72,422.51
  4. Step 4: Simplify right side
    129,011.13x = 12,893,576,640.70
  5. Step 5: Solve for x
    x = 12,893,576,640.70/129,011.13
  6. Step 6: Final answer
    x = 99,941.58

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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.