Home / 81,390.39-112,316.12-45,090.35

Finding the Fourth Proportional to 81,390.39, 112,316.12 and 45,090.35

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Solution

The fourth proportional to 81,390.39, 112,316.12 and 45,090.35 is: 62,223.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,390.39 : 112,316.12 = 45,090.35 : x
  2. Step 2: Convert to fraction form
    81,390.39/112,316.12 = 45,090.35/x
  3. Step 3: Cross multiply
    81,390.39x = 112,316.12 × 45,090.35
  4. Step 4: Simplify right side
    81,390.39x = 5,064,372,648.79
  5. Step 5: Solve for x
    x = 5,064,372,648.79/81,390.39
  6. Step 6: Final answer
    x = 62,223.22

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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.