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Finding the Fourth Proportional to 155,562.76, 214,643.28 and 98,985.04

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Solution

The fourth proportional to 155,562.76, 214,643.28 and 98,985.04 is: 136,578.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,562.76 : 214,643.28 = 98,985.04 : x
  2. Step 2: Convert to fraction form
    155,562.76/214,643.28 = 98,985.04/x
  3. Step 3: Cross multiply
    155,562.76x = 214,643.28 × 98,985.04
  4. Step 4: Simplify right side
    155,562.76x = 21,246,473,656.53
  5. Step 5: Solve for x
    x = 21,246,473,656.53/155,562.76
  6. Step 6: Final answer
    x = 136,578.15

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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.