Home / 56,809.60-78,401.72-31,320.47

Finding the Fourth Proportional to 56,809.60, 78,401.72 and 31,320.47

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Solution

The fourth proportional to 56,809.60, 78,401.72 and 31,320.47 is: 43,224.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,809.60 : 78,401.72 = 31,320.47 : x
  2. Step 2: Convert to fraction form
    56,809.60/78,401.72 = 31,320.47/x
  3. Step 3: Cross multiply
    56,809.60x = 78,401.72 × 31,320.47
  4. Step 4: Simplify right side
    56,809.60x = 2,455,578,993.51
  5. Step 5: Solve for x
    x = 2,455,578,993.51/56,809.60
  6. Step 6: Final answer
    x = 43,224.72

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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.