Home / 56,631.81-78,153.90-31,140.12

Finding the Fourth Proportional to 56,631.81, 78,153.90 and 31,140.12

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Solution

The fourth proportional to 56,631.81, 78,153.90 and 31,140.12 is: 42,974.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,631.81 : 78,153.90 = 31,140.12 : x
  2. Step 2: Convert to fraction form
    56,631.81/78,153.90 = 31,140.12/x
  3. Step 3: Cross multiply
    56,631.81x = 78,153.90 × 31,140.12
  4. Step 4: Simplify right side
    56,631.81x = 2,433,721,648.17
  5. Step 5: Solve for x
    x = 2,433,721,648.17/56,631.81
  6. Step 6: Final answer
    x = 42,974.46

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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.