Home / 191,621.65-287,555.45-128,513.01

Finding the Fourth Proportional to 191,621.65, 287,555.45 and 128,513.01

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Solution

The fourth proportional to 191,621.65, 287,555.45 and 128,513.01 is: 192,851.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,621.65 : 287,555.45 = 128,513.01 : x
  2. Step 2: Convert to fraction form
    191,621.65/287,555.45 = 128,513.01/x
  3. Step 3: Cross multiply
    191,621.65x = 287,555.45 × 128,513.01
  4. Step 4: Simplify right side
    191,621.65x = 36,954,616,421.40
  5. Step 5: Solve for x
    x = 36,954,616,421.40/191,621.65
  6. Step 6: Final answer
    x = 192,851.99

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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.