Home / 85,710.16-118,291.80-51,720.40

Finding the Fourth Proportional to 85,710.16, 118,291.80 and 51,720.40

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Solution

The fourth proportional to 85,710.16, 118,291.80 and 51,720.40 is: 71,381.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,710.16 : 118,291.80 = 51,720.40 : x
  2. Step 2: Convert to fraction form
    85,710.16/118,291.80 = 51,720.40/x
  3. Step 3: Cross multiply
    85,710.16x = 118,291.80 × 51,720.40
  4. Step 4: Simplify right side
    85,710.16x = 6,118,099,212.72
  5. Step 5: Solve for x
    x = 6,118,099,212.72/85,710.16
  6. Step 6: Final answer
    x = 71,381.26

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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.