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Finding the Fourth Proportional to 66,519.40, 99,779.10 and 65,207.20

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Solution

The fourth proportional to 66,519.40, 99,779.10 and 65,207.20 is: 97,810.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,519.40 : 99,779.10 = 65,207.20 : x
  2. Step 2: Convert to fraction form
    66,519.40/99,779.10 = 65,207.20/x
  3. Step 3: Cross multiply
    66,519.40x = 99,779.10 × 65,207.20
  4. Step 4: Simplify right side
    66,519.40x = 6,506,315,729.52
  5. Step 5: Solve for x
    x = 6,506,315,729.52/66,519.40
  6. Step 6: Final answer
    x = 97,810.80

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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.