Home / 85,890,459.40-128,835,689.10-76,484,609.80

Finding the Fourth Proportional to 85,890,459.40, 128,835,689.10 and 76,484,609.80

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Solution

The fourth proportional to 85,890,459.40, 128,835,689.10 and 76,484,609.80 is: 114,726,914.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,890,459.40 : 128,835,689.10 = 76,484,609.80 : x
  2. Step 2: Convert to fraction form
    85,890,459.40/128,835,689.10 = 76,484,609.80/x
  3. Step 3: Cross multiply
    85,890,459.40x = 128,835,689.10 × 76,484,609.80
  4. Step 4: Simplify right side
    85,890,459.40x = 9,853,947,409,127,612
  5. Step 5: Solve for x
    x = 9,853,947,409,127,612/85,890,459.40
  6. Step 6: Final answer
    x = 114,726,914.70

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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.