Home / 210,979.76-291,152.16-115,487

Finding the Fourth Proportional to 210,979.76, 291,152.16 and 115,487

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Solution

The fourth proportional to 210,979.76, 291,152.16 and 115,487 is: 159,372.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,979.76 : 291,152.16 = 115,487 : x
  2. Step 2: Convert to fraction form
    210,979.76/291,152.16 = 115,487/x
  3. Step 3: Cross multiply
    210,979.76x = 291,152.16 × 115,487
  4. Step 4: Simplify right side
    210,979.76x = 33,624,289,501.92
  5. Step 5: Solve for x
    x = 33,624,289,501.92/210,979.76
  6. Step 6: Final answer
    x = 159,372.11

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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.