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Finding the Fourth Proportional to 158,642.58, 218,925.36 and 87,021.30

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Solution

The fourth proportional to 158,642.58, 218,925.36 and 87,021.30 is: 120,088.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,642.58 : 218,925.36 = 87,021.30 : x
  2. Step 2: Convert to fraction form
    158,642.58/218,925.36 = 87,021.30/x
  3. Step 3: Cross multiply
    158,642.58x = 218,925.36 × 87,021.30
  4. Step 4: Simplify right side
    158,642.58x = 19,051,169,430.17
  5. Step 5: Solve for x
    x = 19,051,169,430.17/158,642.58
  6. Step 6: Final answer
    x = 120,088.63

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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.