Home / 105,323.60-145,379.40-86,661.20

Finding the Fourth Proportional to 105,323.60, 145,379.40 and 86,661.20

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Solution

The fourth proportional to 105,323.60, 145,379.40 and 86,661.20 is: 119,619.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,323.60 : 145,379.40 = 86,661.20 : x
  2. Step 2: Convert to fraction form
    105,323.60/145,379.40 = 86,661.20/x
  3. Step 3: Cross multiply
    105,323.60x = 145,379.40 × 86,661.20
  4. Step 4: Simplify right side
    105,323.60x = 12,598,753,259.28
  5. Step 5: Solve for x
    x = 12,598,753,259.28/105,323.60
  6. Step 6: Final answer
    x = 119,619.47

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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.