Home / 108,639.60-162,959.40-91,143.60

Finding the Fourth Proportional to 108,639.60, 162,959.40 and 91,143.60

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Solution

The fourth proportional to 108,639.60, 162,959.40 and 91,143.60 is: 136,715.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,639.60 : 162,959.40 = 91,143.60 : x
  2. Step 2: Convert to fraction form
    108,639.60/162,959.40 = 91,143.60/x
  3. Step 3: Cross multiply
    108,639.60x = 162,959.40 × 91,143.60
  4. Step 4: Simplify right side
    108,639.60x = 14,852,706,369.84
  5. Step 5: Solve for x
    x = 14,852,706,369.84/108,639.60
  6. Step 6: Final answer
    x = 136,715.40

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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.