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Finding the Fourth Proportional to 249,643.61, 374,428.51 and 91,835.16

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Solution

The fourth proportional to 249,643.61, 374,428.51 and 91,835.16 is: 137,739.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,643.61 : 374,428.51 = 91,835.16 : x
  2. Step 2: Convert to fraction form
    249,643.61/374,428.51 = 91,835.16/x
  3. Step 3: Cross multiply
    249,643.61x = 374,428.51 × 91,835.16
  4. Step 4: Simplify right side
    249,643.61x = 34,385,701,894.82
  5. Step 5: Solve for x
    x = 34,385,701,894.82/249,643.61
  6. Step 6: Final answer
    x = 137,739.16

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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.