Home / 98,778.78-136,314.36-56,337.21

Finding the Fourth Proportional to 98,778.78, 136,314.36 and 56,337.21

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Solution

The fourth proportional to 98,778.78, 136,314.36 and 56,337.21 is: 77,745.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,778.78 : 136,314.36 = 56,337.21 : x
  2. Step 2: Convert to fraction form
    98,778.78/136,314.36 = 56,337.21/x
  3. Step 3: Cross multiply
    98,778.78x = 136,314.36 × 56,337.21
  4. Step 4: Simplify right side
    98,778.78x = 7,679,570,725.34
  5. Step 5: Solve for x
    x = 7,679,570,725.34/98,778.78
  6. Step 6: Final answer
    x = 77,745.15

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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.