Home / 142,987.02-197,345.74-79,345.32

Finding the Fourth Proportional to 142,987.02, 197,345.74 and 79,345.32

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Solution

The fourth proportional to 142,987.02, 197,345.74 and 79,345.32 is: 109,509.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,987.02 : 197,345.74 = 79,345.32 : x
  2. Step 2: Convert to fraction form
    142,987.02/197,345.74 = 79,345.32/x
  3. Step 3: Cross multiply
    142,987.02x = 197,345.74 × 79,345.32
  4. Step 4: Simplify right side
    142,987.02x = 15,658,460,890.94
  5. Step 5: Solve for x
    x = 15,658,460,890.94/142,987.02
  6. Step 6: Final answer
    x = 109,509.67

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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.