Home / 85,890,396.90-128,835,595.35-76,484,547.30

Finding the Fourth Proportional to 85,890,396.90, 128,835,595.35 and 76,484,547.30

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Solution

The fourth proportional to 85,890,396.90, 128,835,595.35 and 76,484,547.30 is: 114,726,820.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,890,396.90 : 128,835,595.35 = 76,484,547.30 : x
  2. Step 2: Convert to fraction form
    85,890,396.90/128,835,595.35 = 76,484,547.30/x
  3. Step 3: Cross multiply
    85,890,396.90x = 128,835,595.35 × 76,484,547.30
  4. Step 4: Simplify right side
    85,890,396.90x = 9,853,932,186,470,734
  5. Step 5: Solve for x
    x = 9,853,932,186,470,734/85,890,396.90
  6. Step 6: Final answer
    x = 114,726,820.95

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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.