Home / 78,051.12-107,710.68-42,241.20

Finding the Fourth Proportional to 78,051.12, 107,710.68 and 42,241.20

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Solution

The fourth proportional to 78,051.12, 107,710.68 and 42,241.20 is: 58,292.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,051.12 : 107,710.68 = 42,241.20 : x
  2. Step 2: Convert to fraction form
    78,051.12/107,710.68 = 42,241.20/x
  3. Step 3: Cross multiply
    78,051.12x = 107,710.68 × 42,241.20
  4. Step 4: Simplify right side
    78,051.12x = 4,549,828,376.02
  5. Step 5: Solve for x
    x = 4,549,828,376.02/78,051.12
  6. Step 6: Final answer
    x = 58,292.93

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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.