Home / 85,960,681.60-128,941,022.40-80,917,686.40

Finding the Fourth Proportional to 85,960,681.60, 128,941,022.40 and 80,917,686.40

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Solution

The fourth proportional to 85,960,681.60, 128,941,022.40 and 80,917,686.40 is: 121,376,529.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,960,681.60 : 128,941,022.40 = 80,917,686.40 : x
  2. Step 2: Convert to fraction form
    85,960,681.60/128,941,022.40 = 80,917,686.40/x
  3. Step 3: Cross multiply
    85,960,681.60x = 128,941,022.40 × 80,917,686.40
  4. Step 4: Simplify right side
    85,960,681.60x = 10,433,609,214,658,576
  5. Step 5: Solve for x
    x = 10,433,609,214,658,576/85,960,681.60
  6. Step 6: Final answer
    x = 121,376,529.60

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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.