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Finding the Fourth Proportional to 65,712.80, 98,569.20 and 47,050.40

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Solution

The fourth proportional to 65,712.80, 98,569.20 and 47,050.40 is: 70,575.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,712.80 : 98,569.20 = 47,050.40 : x
  2. Step 2: Convert to fraction form
    65,712.80/98,569.20 = 47,050.40/x
  3. Step 3: Cross multiply
    65,712.80x = 98,569.20 × 47,050.40
  4. Step 4: Simplify right side
    65,712.80x = 4,637,720,287.68
  5. Step 5: Solve for x
    x = 4,637,720,287.68/65,712.80
  6. Step 6: Final answer
    x = 70,575.60

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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.