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Finding the Fourth Proportional to 210,314.80, 314,953.80 and 139,812.40

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Solution

The fourth proportional to 210,314.80, 314,953.80 and 139,812.40 is: 209,373.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,314.80 : 314,953.80 = 139,812.40 : x
  2. Step 2: Convert to fraction form
    210,314.80/314,953.80 = 139,812.40/x
  3. Step 3: Cross multiply
    210,314.80x = 314,953.80 × 139,812.40
  4. Step 4: Simplify right side
    210,314.80x = 44,034,446,667.12
  5. Step 5: Solve for x
    x = 44,034,446,667.12/210,314.80
  6. Step 6: Final answer
    x = 209,373.98

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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.