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Finding the Fourth Proportional to 60,710.20, 90,968.10 and 39,909.40

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Solution

The fourth proportional to 60,710.20, 90,968.10 and 39,909.40 is: 59,800.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,710.20 : 90,968.10 = 39,909.40 : x
  2. Step 2: Convert to fraction form
    60,710.20/90,968.10 = 39,909.40/x
  3. Step 3: Cross multiply
    60,710.20x = 90,968.10 × 39,909.40
  4. Step 4: Simplify right side
    60,710.20x = 3,630,482,290.14
  5. Step 5: Solve for x
    x = 3,630,482,290.14/60,710.20
  6. Step 6: Final answer
    x = 59,800.20

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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.