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Finding the Fourth Proportional to 56,386.80, 77,808.36 and 33,721.20

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Solution

The fourth proportional to 56,386.80, 77,808.36 and 33,721.20 is: 46,532.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,386.80 : 77,808.36 = 33,721.20 : x
  2. Step 2: Convert to fraction form
    56,386.80/77,808.36 = 33,721.20/x
  3. Step 3: Cross multiply
    56,386.80x = 77,808.36 × 33,721.20
  4. Step 4: Simplify right side
    56,386.80x = 2,623,791,269.23
  5. Step 5: Solve for x
    x = 2,623,791,269.23/56,386.80
  6. Step 6: Final answer
    x = 46,532.01

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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.