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Finding the Fourth Proportional to 71,528.40, 107,200.80 and 39,938.40

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Solution

The fourth proportional to 71,528.40, 107,200.80 and 39,938.40 is: 59,856.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,528.40 : 107,200.80 = 39,938.40 : x
  2. Step 2: Convert to fraction form
    71,528.40/107,200.80 = 39,938.40/x
  3. Step 3: Cross multiply
    71,528.40x = 107,200.80 × 39,938.40
  4. Step 4: Simplify right side
    71,528.40x = 4,281,428,430.72
  5. Step 5: Solve for x
    x = 4,281,428,430.72/71,528.40
  6. Step 6: Final answer
    x = 59,856.34

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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.