Home / 129,931.36-179,335.02-76,218.64

Finding the Fourth Proportional to 129,931.36, 179,335.02 and 76,218.64

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Solution

The fourth proportional to 129,931.36, 179,335.02 and 76,218.64 is: 105,199.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,931.36 : 179,335.02 = 76,218.64 : x
  2. Step 2: Convert to fraction form
    129,931.36/179,335.02 = 76,218.64/x
  3. Step 3: Cross multiply
    129,931.36x = 179,335.02 × 76,218.64
  4. Step 4: Simplify right side
    129,931.36x = 13,668,671,328.77
  5. Step 5: Solve for x
    x = 13,668,671,328.77/129,931.36
  6. Step 6: Final answer
    x = 105,199.17

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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.