Home / 78,109.36-107,790.84-42,299.68

Finding the Fourth Proportional to 78,109.36, 107,790.84 and 42,299.68

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Solution

The fourth proportional to 78,109.36, 107,790.84 and 42,299.68 is: 58,373.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,109.36 : 107,790.84 = 42,299.68 : x
  2. Step 2: Convert to fraction form
    78,109.36/107,790.84 = 42,299.68/x
  3. Step 3: Cross multiply
    78,109.36x = 107,790.84 × 42,299.68
  4. Step 4: Simplify right side
    78,109.36x = 4,559,518,038.93
  5. Step 5: Solve for x
    x = 4,559,518,038.93/78,109.36
  6. Step 6: Final answer
    x = 58,373.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.