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Finding the Fourth Proportional to 158,651.42, 218,937.76 and 87,030.95

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Solution

The fourth proportional to 158,651.42, 218,937.76 and 87,030.95 is: 120,102.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,651.42 : 218,937.76 = 87,030.95 : x
  2. Step 2: Convert to fraction form
    158,651.42/218,937.76 = 87,030.95/x
  3. Step 3: Cross multiply
    158,651.42x = 218,937.76 × 87,030.95
  4. Step 4: Simplify right side
    158,651.42x = 19,054,359,931.41
  5. Step 5: Solve for x
    x = 19,054,359,931.41/158,651.42
  6. Step 6: Final answer
    x = 120,102.05

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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.