Home / 85,421.16-117,881.64-47,695.68

Finding the Fourth Proportional to 85,421.16, 117,881.64 and 47,695.68

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Solution

The fourth proportional to 85,421.16, 117,881.64 and 47,695.68 is: 65,820.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,421.16 : 117,881.64 = 47,695.68 : x
  2. Step 2: Convert to fraction form
    85,421.16/117,881.64 = 47,695.68/x
  3. Step 3: Cross multiply
    85,421.16x = 117,881.64 × 47,695.68
  4. Step 4: Simplify right side
    85,421.16x = 5,622,444,979.32
  5. Step 5: Solve for x
    x = 5,622,444,979.32/85,421.16
  6. Step 6: Final answer
    x = 65,820.28

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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.