Home / 128,219.47-176,933.60-70,858.10

Finding the Fourth Proportional to 128,219.47, 176,933.60 and 70,858.10

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Solution

The fourth proportional to 128,219.47, 176,933.60 and 70,858.10 is: 97,779.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,219.47 : 176,933.60 = 70,858.10 : x
  2. Step 2: Convert to fraction form
    128,219.47/176,933.60 = 70,858.10/x
  3. Step 3: Cross multiply
    128,219.47x = 176,933.60 × 70,858.10
  4. Step 4: Simplify right side
    128,219.47x = 12,537,179,075.92
  5. Step 5: Solve for x
    x = 12,537,179,075.92/128,219.47
  6. Step 6: Final answer
    x = 97,779.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.