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Finding the Fourth Proportional to 54,572, 81,870.70 and 17,130.02

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Solution

The fourth proportional to 54,572, 81,870.70 and 17,130.02 is: 25,699.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,572 : 81,870.70 = 17,130.02 : x
  2. Step 2: Convert to fraction form
    54,572/81,870.70 = 17,130.02/x
  3. Step 3: Cross multiply
    54,572x = 81,870.70 × 17,130.02
  4. Step 4: Simplify right side
    54,572x = 1,402,446,728.41
  5. Step 5: Solve for x
    x = 1,402,446,728.41/54,572
  6. Step 6: Final answer
    x = 25,699.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.