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Finding the Fourth Proportional to 58,695.20, 87,999.60 and 39,928.40

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Solution

The fourth proportional to 58,695.20, 87,999.60 and 39,928.40 is: 59,863.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,695.20 : 87,999.60 = 39,928.40 : x
  2. Step 2: Convert to fraction form
    58,695.20/87,999.60 = 39,928.40/x
  3. Step 3: Cross multiply
    58,695.20x = 87,999.60 × 39,928.40
  4. Step 4: Simplify right side
    58,695.20x = 3,513,683,228.64
  5. Step 5: Solve for x
    x = 3,513,683,228.64/58,695.20
  6. Step 6: Final answer
    x = 59,863.21

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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.