Home / 132,639.36-182,988.12-81,636.72

Finding the Fourth Proportional to 132,639.36, 182,988.12 and 81,636.72

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Solution

The fourth proportional to 132,639.36, 182,988.12 and 81,636.72 is: 112,625.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,639.36 : 182,988.12 = 81,636.72 : x
  2. Step 2: Convert to fraction form
    132,639.36/182,988.12 = 81,636.72/x
  3. Step 3: Cross multiply
    132,639.36x = 182,988.12 × 81,636.72
  4. Step 4: Simplify right side
    132,639.36x = 14,938,549,915.77
  5. Step 5: Solve for x
    x = 14,938,549,915.77/132,639.36
  6. Step 6: Final answer
    x = 112,625.32

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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.