Home / 210,931.84-291,160-130,421.12

Finding the Fourth Proportional to 210,931.84, 291,160 and 130,421.12

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Solution

The fourth proportional to 210,931.84, 291,160 and 130,421.12 is: 180,026.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,931.84 : 291,160 = 130,421.12 : x
  2. Step 2: Convert to fraction form
    210,931.84/291,160 = 130,421.12/x
  3. Step 3: Cross multiply
    210,931.84x = 291,160 × 130,421.12
  4. Step 4: Simplify right side
    210,931.84x = 37,973,413,299.20
  5. Step 5: Solve for x
    x = 37,973,413,299.20/210,931.84
  6. Step 6: Final answer
    x = 180,026.94

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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.