Home / 90,711.71-136,070.60-31,547.89

Finding the Fourth Proportional to 90,711.71, 136,070.60 and 31,547.89

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Solution

The fourth proportional to 90,711.71, 136,070.60 and 31,547.89 is: 47,322.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,711.71 : 136,070.60 = 31,547.89 : x
  2. Step 2: Convert to fraction form
    90,711.71/136,070.60 = 31,547.89/x
  3. Step 3: Cross multiply
    90,711.71x = 136,070.60 × 31,547.89
  4. Step 4: Simplify right side
    90,711.71x = 4,292,739,823.12
  5. Step 5: Solve for x
    x = 4,292,739,823.12/90,711.71
  6. Step 6: Final answer
    x = 47,322.89

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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.