Home / 99,640,000.80-149,460,001.20-72,430,221.60

Finding the Fourth Proportional to 99,640,000.80, 149,460,001.20 and 72,430,221.60

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Solution

The fourth proportional to 99,640,000.80, 149,460,001.20 and 72,430,221.60 is: 108,645,332.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,640,000.80 : 149,460,001.20 = 72,430,221.60 : x
  2. Step 2: Convert to fraction form
    99,640,000.80/149,460,001.20 = 72,430,221.60/x
  3. Step 3: Cross multiply
    99,640,000.80x = 149,460,001.20 × 72,430,221.60
  4. Step 4: Simplify right side
    99,640,000.80x = 10,825,421,007,252,264
  5. Step 5: Solve for x
    x = 10,825,421,007,252,264/99,640,000.80
  6. Step 6: Final answer
    x = 108,645,332.40

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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.