Home / 65,785.40-98,678.10-42,165.80

Finding the Fourth Proportional to 65,785.40, 98,678.10 and 42,165.80

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Solution

The fourth proportional to 65,785.40, 98,678.10 and 42,165.80 is: 63,248.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,785.40 : 98,678.10 = 42,165.80 : x
  2. Step 2: Convert to fraction form
    65,785.40/98,678.10 = 42,165.80/x
  3. Step 3: Cross multiply
    65,785.40x = 98,678.10 × 42,165.80
  4. Step 4: Simplify right side
    65,785.40x = 4,160,841,028.98
  5. Step 5: Solve for x
    x = 4,160,841,028.98/65,785.40
  6. Step 6: Final answer
    x = 63,248.70

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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.