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Finding the Fourth Proportional to 66,472,603.20, 99,708,904.80 and 43,779,124.80

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Solution

The fourth proportional to 66,472,603.20, 99,708,904.80 and 43,779,124.80 is: 65,668,687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,472,603.20 : 99,708,904.80 = 43,779,124.80 : x
  2. Step 2: Convert to fraction form
    66,472,603.20/99,708,904.80 = 43,779,124.80/x
  3. Step 3: Cross multiply
    66,472,603.20x = 99,708,904.80 × 43,779,124.80
  4. Step 4: Simplify right side
    66,472,603.20x = 4,365,168,586,910,518.50
  5. Step 5: Solve for x
    x = 4,365,168,586,910,518.50/66,472,603.20
  6. Step 6: Final answer
    x = 65,668,687.20

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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.