Home / 145,349.80-200,015.94-128,622.76

Finding the Fourth Proportional to 145,349.80, 200,015.94 and 128,622.76

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Solution

The fourth proportional to 145,349.80, 200,015.94 and 128,622.76 is: 176,997.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,349.80 : 200,015.94 = 128,622.76 : x
  2. Step 2: Convert to fraction form
    145,349.80/200,015.94 = 128,622.76/x
  3. Step 3: Cross multiply
    145,349.80x = 200,015.94 × 128,622.76
  4. Step 4: Simplify right side
    145,349.80x = 25,726,602,246.79
  5. Step 5: Solve for x
    x = 25,726,602,246.79/145,349.80
  6. Step 6: Final answer
    x = 176,997.85

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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.