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Finding the Fourth Proportional to 70,284.93, 105,415.65 and 30,831.45

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Solution

The fourth proportional to 70,284.93, 105,415.65 and 30,831.45 is: 46,242.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,284.93 : 105,415.65 = 30,831.45 : x
  2. Step 2: Convert to fraction form
    70,284.93/105,415.65 = 30,831.45/x
  3. Step 3: Cross multiply
    70,284.93x = 105,415.65 × 30,831.45
  4. Step 4: Simplify right side
    70,284.93x = 3,250,117,342.19
  5. Step 5: Solve for x
    x = 3,250,117,342.19/70,284.93
  6. Step 6: Final answer
    x = 46,242.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.