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Finding the Fourth Proportional to 58,139.60, 87,209.40 and 38,440.40

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Solution

The fourth proportional to 58,139.60, 87,209.40 and 38,440.40 is: 57,660.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,139.60 : 87,209.40 = 38,440.40 : x
  2. Step 2: Convert to fraction form
    58,139.60/87,209.40 = 38,440.40/x
  3. Step 3: Cross multiply
    58,139.60x = 87,209.40 × 38,440.40
  4. Step 4: Simplify right side
    58,139.60x = 3,352,364,219.76
  5. Step 5: Solve for x
    x = 3,352,364,219.76/58,139.60
  6. Step 6: Final answer
    x = 57,660.60

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1.5x scale

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.