Home / 105,221.40-145,208.88-57,479.16

Finding the Fourth Proportional to 105,221.40, 145,208.88 and 57,479.16

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Solution

The fourth proportional to 105,221.40, 145,208.88 and 57,479.16 is: 79,323.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,221.40 : 145,208.88 = 57,479.16 : x
  2. Step 2: Convert to fraction form
    105,221.40/145,208.88 = 57,479.16/x
  3. Step 3: Cross multiply
    105,221.40x = 145,208.88 × 57,479.16
  4. Step 4: Simplify right side
    105,221.40x = 8,346,484,446.94
  5. Step 5: Solve for x
    x = 8,346,484,446.94/105,221.40
  6. Step 6: Final answer
    x = 79,323.07

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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.