Home / 88,148.16-121,652.64-65,515.08

Finding the Fourth Proportional to 88,148.16, 121,652.64 and 65,515.08

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Solution

The fourth proportional to 88,148.16, 121,652.64 and 65,515.08 is: 90,416.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,148.16 : 121,652.64 = 65,515.08 : x
  2. Step 2: Convert to fraction form
    88,148.16/121,652.64 = 65,515.08/x
  3. Step 3: Cross multiply
    88,148.16x = 121,652.64 × 65,515.08
  4. Step 4: Simplify right side
    88,148.16x = 7,970,082,441.81
  5. Step 5: Solve for x
    x = 7,970,082,441.81/88,148.16
  6. Step 6: Final answer
    x = 90,416.89

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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.