Home / 78,139.12-107,762.52-61,342.96

Finding the Fourth Proportional to 78,139.12, 107,762.52 and 61,342.96

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Solution

The fourth proportional to 78,139.12, 107,762.52 and 61,342.96 is: 84,598.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,139.12 : 107,762.52 = 61,342.96 : x
  2. Step 2: Convert to fraction form
    78,139.12/107,762.52 = 61,342.96/x
  3. Step 3: Cross multiply
    78,139.12x = 107,762.52 × 61,342.96
  4. Step 4: Simplify right side
    78,139.12x = 6,610,471,953.86
  5. Step 5: Solve for x
    x = 6,610,471,953.86/78,139.12
  6. Step 6: Final answer
    x = 84,598.75

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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.