Home / 93,431.18-128,931-53,139.26

Finding the Fourth Proportional to 93,431.18, 128,931 and 53,139.26

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Solution

The fourth proportional to 93,431.18, 128,931 and 53,139.26 is: 73,329.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,431.18 : 128,931 = 53,139.26 : x
  2. Step 2: Convert to fraction form
    93,431.18/128,931 = 53,139.26/x
  3. Step 3: Cross multiply
    93,431.18x = 128,931 × 53,139.26
  4. Step 4: Simplify right side
    93,431.18x = 6,851,297,931.06
  5. Step 5: Solve for x
    x = 6,851,297,931.06/93,431.18
  6. Step 6: Final answer
    x = 73,329.89

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1.5x scale

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.