Home / 129,431.69-178,670.84-87,014.82

Finding the Fourth Proportional to 129,431.69, 178,670.84 and 87,014.82

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Solution

The fourth proportional to 129,431.69, 178,670.84 and 87,014.82 is: 120,117.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,431.69 : 178,670.84 = 87,014.82 : x
  2. Step 2: Convert to fraction form
    129,431.69/178,670.84 = 87,014.82/x
  3. Step 3: Cross multiply
    129,431.69x = 178,670.84 × 87,014.82
  4. Step 4: Simplify right side
    129,431.69x = 15,547,010,981.85
  5. Step 5: Solve for x
    x = 15,547,010,981.85/129,431.69
  6. Step 6: Final answer
    x = 120,117.50

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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.