Home / 56,854.12-78,459.10-31,361.40

Finding the Fourth Proportional to 56,854.12, 78,459.10 and 31,361.40

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Solution

The fourth proportional to 56,854.12, 78,459.10 and 31,361.40 is: 43,278.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,854.12 : 78,459.10 = 31,361.40 : x
  2. Step 2: Convert to fraction form
    56,854.12/78,459.10 = 31,361.40/x
  3. Step 3: Cross multiply
    56,854.12x = 78,459.10 × 31,361.40
  4. Step 4: Simplify right side
    56,854.12x = 2,460,587,218.74
  5. Step 5: Solve for x
    x = 2,460,587,218.74/56,854.12
  6. Step 6: Final answer
    x = 43,278.96

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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.