Home / 78,457.07-117,648.63-28,501.94

Finding the Fourth Proportional to 78,457.07, 117,648.63 and 28,501.94

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Solution

The fourth proportional to 78,457.07, 117,648.63 and 28,501.94 is: 42,739.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,457.07 : 117,648.63 = 28,501.94 : x
  2. Step 2: Convert to fraction form
    78,457.07/117,648.63 = 28,501.94/x
  3. Step 3: Cross multiply
    78,457.07x = 117,648.63 × 28,501.94
  4. Step 4: Simplify right side
    78,457.07x = 3,353,214,193.34
  5. Step 5: Solve for x
    x = 3,353,214,193.34/78,457.07
  6. Step 6: Final answer
    x = 42,739.48

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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.