Home / 81,246.40-121,869.60-70,878.40

Finding the Fourth Proportional to 81,246.40, 121,869.60 and 70,878.40

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Solution

The fourth proportional to 81,246.40, 121,869.60 and 70,878.40 is: 106,317.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,246.40 : 121,869.60 = 70,878.40 : x
  2. Step 2: Convert to fraction form
    81,246.40/121,869.60 = 70,878.40/x
  3. Step 3: Cross multiply
    81,246.40x = 121,869.60 × 70,878.40
  4. Step 4: Simplify right side
    81,246.40x = 8,637,922,256.64
  5. Step 5: Solve for x
    x = 8,637,922,256.64/81,246.40
  6. Step 6: Final answer
    x = 106,317.60

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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.