Home / 129,981.76-179,376-70,365.76

Finding the Fourth Proportional to 129,981.76, 179,376 and 70,365.76

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Solution

The fourth proportional to 129,981.76, 179,376 and 70,365.76 is: 97,105.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,981.76 : 179,376 = 70,365.76 : x
  2. Step 2: Convert to fraction form
    129,981.76/179,376 = 70,365.76/x
  3. Step 3: Cross multiply
    129,981.76x = 179,376 × 70,365.76
  4. Step 4: Simplify right side
    129,981.76x = 12,621,928,565.76
  5. Step 5: Solve for x
    x = 12,621,928,565.76/129,981.76
  6. Step 6: Final answer
    x = 97,105.38

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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.