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Finding the Fourth Proportional to 111,456.68, 153,810.21 and 63,711.05

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Solution

The fourth proportional to 111,456.68, 153,810.21 and 63,711.05 is: 87,921.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,456.68 : 153,810.21 = 63,711.05 : x
  2. Step 2: Convert to fraction form
    111,456.68/153,810.21 = 63,711.05/x
  3. Step 3: Cross multiply
    111,456.68x = 153,810.21 × 63,711.05
  4. Step 4: Simplify right side
    111,456.68x = 9,799,409,210.77
  5. Step 5: Solve for x
    x = 9,799,409,210.77/111,456.68
  6. Step 6: Final answer
    x = 87,921.24

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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.