Home / 72,840.28-100,519.55-42,631.35

Finding the Fourth Proportional to 72,840.28, 100,519.55 and 42,631.35

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Solution

The fourth proportional to 72,840.28, 100,519.55 and 42,631.35 is: 58,831.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,840.28 : 100,519.55 = 42,631.35 : x
  2. Step 2: Convert to fraction form
    72,840.28/100,519.55 = 42,631.35/x
  3. Step 3: Cross multiply
    72,840.28x = 100,519.55 × 42,631.35
  4. Step 4: Simplify right side
    72,840.28x = 4,285,284,117.89
  5. Step 5: Solve for x
    x = 4,285,284,117.89/72,840.28
  6. Step 6: Final answer
    x = 58,831.25

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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.