Home / 103,987.37-143,502.60-56,240.72

Finding the Fourth Proportional to 103,987.37, 143,502.60 and 56,240.72

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Solution

The fourth proportional to 103,987.37, 143,502.60 and 56,240.72 is: 77,612.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,987.37 : 143,502.60 = 56,240.72 : x
  2. Step 2: Convert to fraction form
    103,987.37/143,502.60 = 56,240.72/x
  3. Step 3: Cross multiply
    103,987.37x = 143,502.60 × 56,240.72
  4. Step 4: Simplify right side
    103,987.37x = 8,070,688,828.36
  5. Step 5: Solve for x
    x = 8,070,688,828.36/103,987.37
  6. Step 6: Final answer
    x = 77,612.21

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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.