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Finding the Fourth Proportional to 58,281.60, 87,465.60 and 42,729.60

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Solution

The fourth proportional to 58,281.60, 87,465.60 and 42,729.60 is: 64,126.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,281.60 : 87,465.60 = 42,729.60 : x
  2. Step 2: Convert to fraction form
    58,281.60/87,465.60 = 42,729.60/x
  3. Step 3: Cross multiply
    58,281.60x = 87,465.60 × 42,729.60
  4. Step 4: Simplify right side
    58,281.60x = 3,737,370,101.76
  5. Step 5: Solve for x
    x = 3,737,370,101.76/58,281.60
  6. Step 6: Final answer
    x = 64,126.07

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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.