Home / 115,423-159,283.74-81,947.32

Finding the Fourth Proportional to 115,423, 159,283.74 and 81,947.32

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Solution

The fourth proportional to 115,423, 159,283.74 and 81,947.32 is: 113,087.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,423 : 159,283.74 = 81,947.32 : x
  2. Step 2: Convert to fraction form
    115,423/159,283.74 = 81,947.32/x
  3. Step 3: Cross multiply
    115,423x = 159,283.74 × 81,947.32
  4. Step 4: Simplify right side
    115,423x = 13,052,875,612.58
  5. Step 5: Solve for x
    x = 13,052,875,612.58/115,423
  6. Step 6: Final answer
    x = 113,087.30

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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.