Home / 56,139.04-77,471.40-30,988

Finding the Fourth Proportional to 56,139.04, 77,471.40 and 30,988

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Solution

The fourth proportional to 56,139.04, 77,471.40 and 30,988 is: 42,763.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,139.04 : 77,471.40 = 30,988 : x
  2. Step 2: Convert to fraction form
    56,139.04/77,471.40 = 30,988/x
  3. Step 3: Cross multiply
    56,139.04x = 77,471.40 × 30,988
  4. Step 4: Simplify right side
    56,139.04x = 2,400,683,743.20
  5. Step 5: Solve for x
    x = 2,400,683,743.20/56,139.04
  6. Step 6: Final answer
    x = 42,763.18

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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.