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Finding the Fourth Proportional to 66,194,620.80, 99,291,931.20 and 20,750,510.40

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Solution

The fourth proportional to 66,194,620.80, 99,291,931.20 and 20,750,510.40 is: 31,125,765.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,194,620.80 : 99,291,931.20 = 20,750,510.40 : x
  2. Step 2: Convert to fraction form
    66,194,620.80/99,291,931.20 = 20,750,510.40/x
  3. Step 3: Cross multiply
    66,194,620.80x = 99,291,931.20 × 20,750,510.40
  4. Step 4: Simplify right side
    66,194,620.80x = 2,060,358,251,001,684.50
  5. Step 5: Solve for x
    x = 2,060,358,251,001,684.50/66,194,620.80
  6. Step 6: Final answer
    x = 31,125,765.60

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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.