Home / 128,525,801.72-177,370,691.90-72,011,035.10

Finding the Fourth Proportional to 128,525,801.72, 177,370,691.90 and 72,011,035.10

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Solution

The fourth proportional to 128,525,801.72, 177,370,691.90 and 72,011,035.10 is: 99,378,077.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,525,801.72 : 177,370,691.90 = 72,011,035.10 : x
  2. Step 2: Convert to fraction form
    128,525,801.72/177,370,691.90 = 72,011,035.10/x
  3. Step 3: Cross multiply
    128,525,801.72x = 177,370,691.90 × 72,011,035.10
  4. Step 4: Simplify right side
    128,525,801.72x = 12,772,647,118,875,278
  5. Step 5: Solve for x
    x = 12,772,647,118,875,278/128,525,801.72
  6. Step 6: Final answer
    x = 99,378,077.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.