Home / 81,000.70-121,501.05-28,403.35

Finding the Fourth Proportional to 81,000.70, 121,501.05 and 28,403.35

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Solution

The fourth proportional to 81,000.70, 121,501.05 and 28,403.35 is: 42,605.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.70 : 121,501.05 = 28,403.35 : x
  2. Step 2: Convert to fraction form
    81,000.70/121,501.05 = 28,403.35/x
  3. Step 3: Cross multiply
    81,000.70x = 121,501.05 × 28,403.35
  4. Step 4: Simplify right side
    81,000.70x = 3,451,036,848.52
  5. Step 5: Solve for x
    x = 3,451,036,848.52/81,000.70
  6. Step 6: Final answer
    x = 42,605.03

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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.