Home / 85,826,681.80-128,740,022.70-76,473,320.20

Finding the Fourth Proportional to 85,826,681.80, 128,740,022.70 and 76,473,320.20

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Solution

The fourth proportional to 85,826,681.80, 128,740,022.70 and 76,473,320.20 is: 114,709,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,826,681.80 : 128,740,022.70 = 76,473,320.20 : x
  2. Step 2: Convert to fraction form
    85,826,681.80/128,740,022.70 = 76,473,320.20/x
  3. Step 3: Cross multiply
    85,826,681.80x = 128,740,022.70 × 76,473,320.20
  4. Step 4: Simplify right side
    85,826,681.80x = 9,845,176,978,492,370
  5. Step 5: Solve for x
    x = 9,845,176,978,492,370/85,826,681.80
  6. Step 6: Final answer
    x = 114,709,980.30

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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.