Home / 156,931.86-216,570.21-85,316.79

Finding the Fourth Proportional to 156,931.86, 216,570.21 and 85,316.79

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Solution

The fourth proportional to 156,931.86, 216,570.21 and 85,316.79 is: 117,739.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,931.86 : 216,570.21 = 85,316.79 : x
  2. Step 2: Convert to fraction form
    156,931.86/216,570.21 = 85,316.79/x
  3. Step 3: Cross multiply
    156,931.86x = 216,570.21 × 85,316.79
  4. Step 4: Simplify right side
    156,931.86x = 18,477,075,126.83
  5. Step 5: Solve for x
    x = 18,477,075,126.83/156,931.86
  6. Step 6: Final answer
    x = 117,739.48

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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.