Home / 85,421.36-117,877.20-47,688.32

Finding the Fourth Proportional to 85,421.36, 117,877.20 and 47,688.32

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Solution

The fourth proportional to 85,421.36, 117,877.20 and 47,688.32 is: 65,807.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,421.36 : 117,877.20 = 47,688.32 : x
  2. Step 2: Convert to fraction form
    85,421.36/117,877.20 = 47,688.32/x
  3. Step 3: Cross multiply
    85,421.36x = 117,877.20 × 47,688.32
  4. Step 4: Simplify right side
    85,421.36x = 5,621,365,634.30
  5. Step 5: Solve for x
    x = 5,621,365,634.30/85,421.36
  6. Step 6: Final answer
    x = 65,807.49

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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.