Home / 85,960,712.60-128,941,068.90-80,917,717.40

Finding the Fourth Proportional to 85,960,712.60, 128,941,068.90 and 80,917,717.40

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Solution

The fourth proportional to 85,960,712.60, 128,941,068.90 and 80,917,717.40 is: 121,376,576.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,960,712.60 : 128,941,068.90 = 80,917,717.40 : x
  2. Step 2: Convert to fraction form
    85,960,712.60/128,941,068.90 = 80,917,717.40/x
  3. Step 3: Cross multiply
    85,960,712.60x = 128,941,068.90 × 80,917,717.40
  4. Step 4: Simplify right side
    85,960,712.60x = 10,433,616,974,504,130
  5. Step 5: Solve for x
    x = 10,433,616,974,504,130/85,960,712.60
  6. Step 6: Final answer
    x = 121,376,576.10

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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.