Home / 112,008.60-168,012.90-86,639.40

Finding the Fourth Proportional to 112,008.60, 168,012.90 and 86,639.40

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Solution

The fourth proportional to 112,008.60, 168,012.90 and 86,639.40 is: 129,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,008.60 : 168,012.90 = 86,639.40 : x
  2. Step 2: Convert to fraction form
    112,008.60/168,012.90 = 86,639.40/x
  3. Step 3: Cross multiply
    112,008.60x = 168,012.90 × 86,639.40
  4. Step 4: Simplify right side
    112,008.60x = 14,556,536,848.26
  5. Step 5: Solve for x
    x = 14,556,536,848.26/112,008.60
  6. Step 6: Final answer
    x = 129,959.10

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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.