Home / 87,970.32-121,455.18-57,809.16

Finding the Fourth Proportional to 87,970.32, 121,455.18 and 57,809.16

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Solution

The fourth proportional to 87,970.32, 121,455.18 and 57,809.16 is: 79,813.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,970.32 : 121,455.18 = 57,809.16 : x
  2. Step 2: Convert to fraction form
    87,970.32/121,455.18 = 57,809.16/x
  3. Step 3: Cross multiply
    87,970.32x = 121,455.18 × 57,809.16
  4. Step 4: Simplify right side
    87,970.32x = 7,021,221,933.45
  5. Step 5: Solve for x
    x = 7,021,221,933.45/87,970.32
  6. Step 6: Final answer
    x = 79,813.53

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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.