Home / 81,315.40-121,973.10-48,051.40

Finding the Fourth Proportional to 81,315.40, 121,973.10 and 48,051.40

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Solution

The fourth proportional to 81,315.40, 121,973.10 and 48,051.40 is: 72,077.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,315.40 : 121,973.10 = 48,051.40 : x
  2. Step 2: Convert to fraction form
    81,315.40/121,973.10 = 48,051.40/x
  3. Step 3: Cross multiply
    81,315.40x = 121,973.10 × 48,051.40
  4. Step 4: Simplify right side
    81,315.40x = 5,860,978,217.34
  5. Step 5: Solve for x
    x = 5,860,978,217.34/81,315.40
  6. Step 6: Final answer
    x = 72,077.10

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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.