Home / 78,986,412.72-118,484,817.76-20,695,518.06

Finding the Fourth Proportional to 78,986,412.72, 118,484,817.76 and 20,695,518.06

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Solution

The fourth proportional to 78,986,412.72, 118,484,817.76 and 20,695,518.06 is: 31,044,639.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,986,412.72 : 118,484,817.76 = 20,695,518.06 : x
  2. Step 2: Convert to fraction form
    78,986,412.72/118,484,817.76 = 20,695,518.06/x
  3. Step 3: Cross multiply
    78,986,412.72x = 118,484,817.76 × 20,695,518.06
  4. Step 4: Simplify right side
    78,986,412.72x = 2,452,104,685,787,888.50
  5. Step 5: Solve for x
    x = 2,452,104,685,787,888.50/78,986,412.72
  6. Step 6: Final answer
    x = 31,044,639.22

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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.