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Finding the Fourth Proportional to 65,830.40, 98,745.60 and 42,210.80

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Solution

The fourth proportional to 65,830.40, 98,745.60 and 42,210.80 is: 63,316.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,830.40 : 98,745.60 = 42,210.80 : x
  2. Step 2: Convert to fraction form
    65,830.40/98,745.60 = 42,210.80/x
  3. Step 3: Cross multiply
    65,830.40x = 98,745.60 × 42,210.80
  4. Step 4: Simplify right side
    65,830.40x = 4,168,130,772.48
  5. Step 5: Solve for x
    x = 4,168,130,772.48/65,830.40
  6. Step 6: Final answer
    x = 63,316.20

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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.