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Finding the Fourth Proportional to 210,878.04, 316,317.26 and 86,219.04

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Solution

The fourth proportional to 210,878.04, 316,317.26 and 86,219.04 is: 129,328.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,878.04 : 316,317.26 = 86,219.04 : x
  2. Step 2: Convert to fraction form
    210,878.04/316,317.26 = 86,219.04/x
  3. Step 3: Cross multiply
    210,878.04x = 316,317.26 × 86,219.04
  4. Step 4: Simplify right side
    210,878.04x = 27,272,570,492.63
  5. Step 5: Solve for x
    x = 27,272,570,492.63/210,878.04
  6. Step 6: Final answer
    x = 129,328.64

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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.