Home / 319,075.40-478,701.90-139,176.56

Finding the Fourth Proportional to 319,075.40, 478,701.90 and 139,176.56

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Solution

The fourth proportional to 319,075.40, 478,701.90 and 139,176.56 is: 208,803.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,075.40 : 478,701.90 = 139,176.56 : x
  2. Step 2: Convert to fraction form
    319,075.40/478,701.90 = 139,176.56/x
  3. Step 3: Cross multiply
    319,075.40x = 478,701.90 × 139,176.56
  4. Step 4: Simplify right side
    319,075.40x = 66,624,084,904.22
  5. Step 5: Solve for x
    x = 66,624,084,904.22/319,075.40
  6. Step 6: Final answer
    x = 208,803.58

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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.