Home / 85,890,397.40-128,835,596.10-76,484,547.80

Finding the Fourth Proportional to 85,890,397.40, 128,835,596.10 and 76,484,547.80

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Solution

The fourth proportional to 85,890,397.40, 128,835,596.10 and 76,484,547.80 is: 114,726,821.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,890,397.40 : 128,835,596.10 = 76,484,547.80 : x
  2. Step 2: Convert to fraction form
    85,890,397.40/128,835,596.10 = 76,484,547.80/x
  3. Step 3: Cross multiply
    85,890,397.40x = 128,835,596.10 × 76,484,547.80
  4. Step 4: Simplify right side
    85,890,397.40x = 9,853,932,308,251,942
  5. Step 5: Solve for x
    x = 9,853,932,308,251,942/85,890,397.40
  6. Step 6: Final answer
    x = 114,726,821.70

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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.