Home / 145,582.36-217,985.10-85,561.24

Finding the Fourth Proportional to 145,582.36, 217,985.10 and 85,561.24

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Solution

The fourth proportional to 145,582.36, 217,985.10 and 85,561.24 is: 128,113.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,582.36 : 217,985.10 = 85,561.24 : x
  2. Step 2: Convert to fraction form
    145,582.36/217,985.10 = 85,561.24/x
  3. Step 3: Cross multiply
    145,582.36x = 217,985.10 × 85,561.24
  4. Step 4: Simplify right side
    145,582.36x = 18,651,075,457.52
  5. Step 5: Solve for x
    x = 18,651,075,457.52/145,582.36
  6. Step 6: Final answer
    x = 128,113.57

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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.