Home / 87,689.36-121,011.33-47,403

Finding the Fourth Proportional to 87,689.36, 121,011.33 and 47,403

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Solution

The fourth proportional to 87,689.36, 121,011.33 and 47,403 is: 65,416.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,689.36 : 121,011.33 = 47,403 : x
  2. Step 2: Convert to fraction form
    87,689.36/121,011.33 = 47,403/x
  3. Step 3: Cross multiply
    87,689.36x = 121,011.33 × 47,403
  4. Step 4: Simplify right side
    87,689.36x = 5,736,300,075.99
  5. Step 5: Solve for x
    x = 5,736,300,075.99/87,689.36
  6. Step 6: Final answer
    x = 65,416.15

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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.