Home / 56,639.75-78,166.10-31,490.87

Finding the Fourth Proportional to 56,639.75, 78,166.10 and 31,490.87

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Solution

The fourth proportional to 56,639.75, 78,166.10 and 31,490.87 is: 43,459.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,639.75 : 78,166.10 = 31,490.87 : x
  2. Step 2: Convert to fraction form
    56,639.75/78,166.10 = 31,490.87/x
  3. Step 3: Cross multiply
    56,639.75x = 78,166.10 × 31,490.87
  4. Step 4: Simplify right side
    56,639.75x = 2,461,518,336.05
  5. Step 5: Solve for x
    x = 2,461,518,336.05/56,639.75
  6. Step 6: Final answer
    x = 43,459.20

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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.