Home / 145,239.93-200,407.59-90,785.70

Finding the Fourth Proportional to 145,239.93, 200,407.59 and 90,785.70

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Solution

The fourth proportional to 145,239.93, 200,407.59 and 90,785.70 is: 125,269.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,239.93 : 200,407.59 = 90,785.70 : x
  2. Step 2: Convert to fraction form
    145,239.93/200,407.59 = 90,785.70/x
  3. Step 3: Cross multiply
    145,239.93x = 200,407.59 × 90,785.70
  4. Step 4: Simplify right side
    145,239.93x = 18,194,143,343.46
  5. Step 5: Solve for x
    x = 18,194,143,343.46/145,239.93
  6. Step 6: Final answer
    x = 125,269.57

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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.