Home / 135,312.08-186,783-121,140.32

Finding the Fourth Proportional to 135,312.08, 186,783 and 121,140.32

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Solution

The fourth proportional to 135,312.08, 186,783 and 121,140.32 is: 167,220.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,312.08 : 186,783 = 121,140.32 : x
  2. Step 2: Convert to fraction form
    135,312.08/186,783 = 121,140.32/x
  3. Step 3: Cross multiply
    135,312.08x = 186,783 × 121,140.32
  4. Step 4: Simplify right side
    135,312.08x = 22,626,952,390.56
  5. Step 5: Solve for x
    x = 22,626,952,390.56/135,312.08
  6. Step 6: Final answer
    x = 167,220.49

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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.