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Finding the Fourth Proportional to 111,411.40, 153,748.40 and 63,666.48

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Solution

The fourth proportional to 111,411.40, 153,748.40 and 63,666.48 is: 87,860.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,411.40 : 153,748.40 = 63,666.48 : x
  2. Step 2: Convert to fraction form
    111,411.40/153,748.40 = 63,666.48/x
  3. Step 3: Cross multiply
    111,411.40x = 153,748.40 × 63,666.48
  4. Step 4: Simplify right side
    111,411.40x = 9,788,619,433.63
  5. Step 5: Solve for x
    x = 9,788,619,433.63/111,411.40
  6. Step 6: Final answer
    x = 87,860.12

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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.