Home / 287,386.11-431,079.12-87,707.52

Finding the Fourth Proportional to 287,386.11, 431,079.12 and 87,707.52

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Solution

The fourth proportional to 287,386.11, 431,079.12 and 87,707.52 is: 131,561.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,386.11 : 431,079.12 = 87,707.52 : x
  2. Step 2: Convert to fraction form
    287,386.11/431,079.12 = 87,707.52/x
  3. Step 3: Cross multiply
    287,386.11x = 431,079.12 × 87,707.52
  4. Step 4: Simplify right side
    287,386.11x = 37,808,880,538.98
  5. Step 5: Solve for x
    x = 37,808,880,538.98/287,386.11
  6. Step 6: Final answer
    x = 131,561.27

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1.5x scale

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.