Home / 147,870.40-221,805.60-81,284.80

Finding the Fourth Proportional to 147,870.40, 221,805.60 and 81,284.80

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Solution

The fourth proportional to 147,870.40, 221,805.60 and 81,284.80 is: 121,927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,870.40 : 221,805.60 = 81,284.80 : x
  2. Step 2: Convert to fraction form
    147,870.40/221,805.60 = 81,284.80/x
  3. Step 3: Cross multiply
    147,870.40x = 221,805.60 × 81,284.80
  4. Step 4: Simplify right side
    147,870.40x = 18,029,423,834.88
  5. Step 5: Solve for x
    x = 18,029,423,834.88/147,870.40
  6. Step 6: Final answer
    x = 121,927.20

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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.